If you still have them ..... i would trace the bolt pattern shape , and just cut your own ABS/rubber flaps and copy the OEM bolt pattern to your freshly cut flare... would probably be easy to make honestlyThat's exactly what I bought the Rally Armor mudflaps for....but I couldn't install them. After driving about 140 miles through mud-packed trails you can really see how much stuff gets kicked up along the sides of the truck.
Now I'm on a quest to have someone help me make extended fender flares.