hi ok quick look about and i have come across this
http://www.surplusandadventure.com/i...cr2108820.html
but not sure how much you want to spend but this is big and tough
there are others like these ones
http://www.surplusandadventure.com/i...cr2108819.html
http://www.surplusandadventure.com/i...cr2108818.html
you can even get our cars in these and take of the sides on the few hot sunny days we get