I don't know if this will help, but I was at my local hobby shop which has a slotcar track in the back, and I noticed that all the slotcars are classics sized. I picked up a porsche slotcar for $30 for a Jazz reshell I may do. May be worth looking into. The plastic is durable yet thin, could probably cut it with a really sharp exacto blade. Here are some pics for comparison. Obviously I gutted the electronics so that only the shell remains, but you can see that it's a pretty close match. Hope this helps!