Hey M6RV6, I have come up with a potential workable solution for this guy to be able to fly a Stinson with his hands only. I used up two commuter train rides and three pages of sketchpad

The delays all too common to the Los Angeles Metrolink train system gave me enough time to sketch out something that "ought to work" fairly well.
If there is an already-existing device for hand controls on a tailwheel airplane, then by all means go with that. If you or he wants something new, then read on.
I
rough-sketched out a three-axis hand control that will allow your disabled pilot to operate the rudder, the throttle, and the brakes with his right hand. Since I didn't have a blueprint or structural drawing of the tubular structure in the Stinson, it was not possible to lay out the mount interface between my unit and the Stinson fuselage structure, or the final dimensions of the new parts.
Modifications to the airframe are likely to include:
Re-location of the brake cylinders
Fabrication and installation of new hydraulic brake lines
Replacement of the throttle control cable
Welding a handful of simple bolt lugs and mounting tabs onto various parts of the Stinson tube structure
The actual hand control unit would likely be fabricated out of steel or aluminum tubing, with several tabs, bushings, clamp blocks, hardware, etc.
This is of course "early sketchpad" stuff only. If or when a decision is made to move forward with the project, IMHO there will have to be at least two or three people other than myself involved. My initial estimate is that there will have to be:
A machinist, amateur/hobby level or better, with reasonable lathe/mill equipment and the capability to set up and operate the equipment
A welder with the skill level appropriate for an experimental aircraft project
A mechanic/installer/fitter in the area where the aircraft is to be modified
If there are CNC mill or waterjet machine tools and operators available that makes it even better of course.
It would be very very helpful if there was a Stinson fuselage that I could have access to here in Los Angeles to measure and stare at, to finalize the design well enough before any parts are fabricated. There is a bare fuselage up near Las Vegas that a mutual friend of ours has access to, but he has apparently been suspended or banned from BCP. There is a flying Stinson at my local airport, but I have no idea if he is willing to disassemble any of the iterior upholstery to be part of this project. Maybe you have other Stinson Club members or aircraft owners here that are willing to participate.
Another
very helpful thing would be to have the participation of someone here in LA who is good with CAD. Solidworks, etc. There is one BCP participant who would be a perfect partner for this (Addicted2Climbing), since he designs and develops precision motion control devices, camera mounts, and other mechanisms professionally. I cannot speak for him at all, and he's awfully busy at his new job.
Obviously this is also heavily dependent on your level of commitment to making this idea into a reality. In other words, there needs to be a Director on this epic movie, and I'm just the actor playing the role of the crazy inventor. This also depends on whether or not the disabled pilot buys your airplane, and whether other BCP members will bring the other parts stuff to the table, etc.
Believe it or not, I think the one thing that should not be that difficult is to secure FAA approval for this. The "Americans with Disabilities Act" (and those who help enforce it) will provide plenty of horsepower and motivation for the FAA to give it a fair chance, and judge it on merit/safety/functionality. Since it would be a field approval approved for one airplane only (at least for now), they will correctly see their risk as being limited. Since the device I sketched out is a very simple mechanical device (no software, electronics, etc.) it will either work as claimed or it will not. There will be no change to the primary flight control systems themselves other than providing another way to operate the existing rudder control.
Anyway, let me know if, when, and how you want to proceed with this.