I wish you the best of luck in finding a place/way to make this happen.
best I can do would be to suggest maybe contacting the fish and game dept in your area and asking if they have any advice or suggestions. as them being more local, they might have more options for you to try, same would be to go to some of the local Archery shops and or gun stores and asking there, maybe even asking if you can put up a sigh asking for help on a bulletin like board or even , if maybe they can ask around for you, or help you find a place
OR any local gun clubs .hunt clubs
places like this I think will be your best chance!
good luck and hope he gets another chance to enjoy hunting again!