Texas is a BIG place. But off the top of my head, two come to mind:
Steve Pierce, Pierce Aero, Graham TX. Steve is one of the most knowledgeable Supercub guys in the lower 48, or anywhere else. He's a busy guy.
Scott Warren, Warren Aircraft. Cubcrafters dealer, lots of experience.
And dudestickle, respectfully, you might get more/better response on the Supercub website,
www.surpercub.org plus it has excellent technical resources and archives of just about any Supercub question you'd think to ask. Lots of folks hang out on both that website and this one, just a different spin on things, both great sources. Good luck on your quest.
Thanks. cubscout