Thats something I would like to try to do some day. I have never dealt with sheet styrene yet. I would like a copy of your templets in case I get brave enough to give it a shot. Great choice in the truck also!
Check out the Customs board there are some of the coolest one offs that you will ever see. Besides the making of customs can be addictive. I have a few in the planning and the work stages at this time. Nothing like what Gunn and some of the others can do but fun none the less!