The fiberglass fender is just about as durable as the factory dodge sheetmetal! :sombrero:
The dually bed has a MUCH higher opening than I did. All I did was basically horizontally stretch the wheel opening.
You can make anything.....its just time, money, tools, and quarters in the swear jar!
I like what I did too. It was just a lot of work.....
I think the opening of the trailer products 'glass fender would match up pretty dang well with the dually bed.
If you just have to have a steel from fender you could try and modifiy the wheel opening in front so its more like the dually opening. The dually opening doesn't have the formed edge like the stock front fender. It basically just has a 'flat' edge that is folded over to the inside if I remember right. I think this could be duplicated, but folding that edge cleanly would be a pain. I would probably advise welding in a 3/16-1/4" rod to the cut edge then welding a 4-6" wide strip to the rod to form the 'lip'. Then trim away the extra 'strip' material on the outside and inside to form a clean 1" wide 'lip' to the fender. Weld it all up....sand it down.....fill, sand, prime, paint
Then you would need to make some kind of inner fender.......
Fun Fun!