Hmm,well if you can't get Fiber then get Aluminum covering's just like in the picture's,go for something a bit heavy,if you get fiber the front part or the rear part of the Buggy can start to lift when you hit the pedal if you don't have enough weight applied on that specific end of the Buggy,that too depends on the place where you want to put your engine...in the back or the front of the Buggy),Any way you do it you'll need something to keep one end of the Buggy too firmly stay put on the ground..