I am building a 37 Ford Coupe. I have widened the rear fenders 4 inches. I also am going to pie cut the running boards so that the edge of the rear fender is flush. The rear fender and the running board will be out the same distance. My question is : Who is the best supplier of running boards and I would also like to use the rubber covers but the stock covers will not work after I widen the running boards. Is there a place that I could purchase the corrugated rubber matierial in sheet form????