Deluxe Trim modifications

[BuckeyenNJ]

I have a set of deluxe trim I want to add to my 51 3600

The deluxe trim was originally designed for the panel trucks as this picture



The trim works on the front fender of AD trucks but not on the rear fender...but it is being used and frequently


My question is how to modify the rear 3 pieces of trim. Does someone provide this service or trim that fits?

I have searched this for about 2 days with no luck and searching through all the builds that come up on a search here might take more time than I have left on this earth

Any help would be appreciated.