There are several used car dealerships that have may sell used
handicap vans. Used vans can also be converted into a handicap
van.
You may be able to find used handicap vans at car dealers in the
area, as well as on CraigsList. A great website to find them in the
Memphis area is
http://www.mobilityvansales.com/used-handicap-vans/tennessee_vansales.html.