I have a 2001, F350 extended cab, 2WD, DRW, that I have been shopping for a canopy for. Canopy dealers have said that you have to buy a canopy that is designed for that truck bed because it is the largest bed made. I have been trying find out if there is a standard dimension canopy that will fit this truck. Will someone out there shed some light on this question? Much thanks to all at FTE.