Thank you so much for all the offers and advice, everyone. The problem has been solved!
My team is getting rid of several older non-historic bots. I grabbed one on my way out the other day. It is fully functional, minus a cRIO. Would anyone be willing to sell me one for the purpose of a chair bot? Also, are there any other possible control solutions besides one? This will never need to operate remotely.
Edit: forgot to mention, it has all elevators and manips removed. All it needs to control is parallel plate w/2 cims per side.