I am working on something similar; designing basic model train car bodies for sale on Shapewayshttp://www.shapeways.com/model/223798/cp_304000_ho_8ft_6in_bulkhead_flat_w_stake_pockets.html?gid=mgand having a second one-stop retail source for purchasing all the decals, paint, trucks, couplers and other details needed to finish the car:http://www.highballgraphics.com/homepage.htmhttp://www.highballgr