Try Anderson Brothers, in Oregon. Very, very large selection of used truck parts. Get the numbers, or type off the box, and have a local NAPA look it up. They are still "VERY" available through NAPA, and if your local counter person can't help, then find a different employee, because that one is an idiot. I source all my older Ford parts through NAPA, and I can get about everything I could ever need through my NAPA. Just ordered a complete gasket kit for my Cat 1160....$95 my cost. Needed suspension brackets for my L8000 frame....my NAPA can get them in, for less than good used ones. Needed a master cylinder kit, and wheel cylinder kits for my '53 F-750. My local NAPAs had them on the shelves.....some in one store, some in another, got them all the next day. Needed parts for a '57 Ford 850 tractor. NAPA had them the next day. I will not use any place but NAPA for my hard to find parts for my old trucks, escept for, obviously, restoration specific parts.