Denalipilot asked me about these seats when I posted a picture of a MAF Cessna 206 at Missionary Maintenance Service. I went back for my W/B today and took some more pics of the seats and asked some more questions.
The seats are made by JARRS. It is a missionary fellowship in North Carolina. I could not find where they have them for sale, but I found their website. Looks like some nice seats that are lightweight and functional. Maybe give them a call and see if they are available to the non-missionary public. Unless you are of course a missionary public.
https://www.jaars.org/







Nice setup for multiple missions.
Edit: Fixed spelling of JAARS.

