hi mark there a piece of soft ware called
ratio software from a very nice man lol
it has all the onroad and offroad cars on if i remember rightly
i have a link though its the free version you can get the full version from a link on the software it real good and not dear for the full version
http://www.hobbytec.co.uk/index.php?...on_view&idev=4
sorry for the link in advance jimmy