GMC panel. You are correct on the picked over avaliability of 1/2 ton stuff.
Lotsa guys are stepping up into the 3/4 & 1 ton trucks. Many of these larger truck parts will never be reproduced.

Stay tuned on the COE fender pads.
I think Spanky has " Steele " rubber working on that case.

The 3/4 & 1 ton GMC caps are easy to make.
All we need is 250 people that need 'em & it can be done easily.
Aint nobody gonna pay for the tooling & the minumum crank out of 1000 units unless there is a market for'em.