Motorized Wheel Chair Source

Hello,
The answer to your question is yes, but it depends on the state you live in, so you must check your blue book in the yellow or white pages and find the ADA (American's with Disabilities) Once you call them, they will help you with the programs in your area so that your son may have a chance to get his van equipped for a good price or even free depending on your finances.
My son, who is 27 now, lived in Ct with us and is still handi-capable! HE has been driving since he was 16 and has adapted his vehicles on his own now, but when he was your son's age, we made sure we were aware of what could be offered to him. It seems like you are giving your son the independence he needs. Way to go mom! I did the same 10 years ago and my son has been on his own since then. SO try that number first and also try The United Spinal Association which used to be The Paralyzed Veterans Assn. ( YOU know, the ones who ask for donations) They are very adept at giving you advice on who to call as well. Good luck with this and by the way; the Dept. of Motor Vehicles also gives special driving lessons and the road test with special vehicles so make sure you ask for that as well.... GOOD luck with this.
Sonata10