Don't know if it would work, but i keep seeing this shell and wondering if you could put it over a spaceframe of some kind, or using a chassis off another car.
www.ebay.co.uk/itm/111052785170?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2648
www.ebay.co.uk/itm/111052785170?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2648