So I bought some gator back mud flaps for my ram 3500 and thought I'd share some pics and thoughts on them. These were 5/8" offset and all pre drilled for factory holes. Still had to drill a couple more holes for added strength. With shipping and tax there were just under $500 for 4. Mine were made out of stainless steel and coated black. This is a Canadian company. Install took about 40 mins with getting tools and such. Link
https://www.truckhardware.ca/products/651
Some pics
Rears
Fronts
Front backside
Installed
https://www.truckhardware.ca/products/651
Some pics
Rears
Fronts
Front backside
Installed