I would start by asking TIRR if they have something in place. Also TIRR is a Model SCI Center -which means they likely also have a support group for patients. Maybe the support group has some transportation assistance? Another idea is to try your local Center for Independent Living. I belive yours is http://www.coil.org/index.php?option=com_frontpage&Itemid=1 they might be able to help or provide ideas/assistance on who can.