Where you located? I have a NOS never before installed full length alum running board for a regular cab long bed. Even have the wheel well splash guards. Previous owner of my home retired from the Ford KY truck plant and I've found a few NOS truck parts laying around. Lots of interior screws. He must have worked on the interior line at some point.
1988 F250 Supercab Longbed 7.3 IDI, C6, 1356, GEARVENDORS, 4.10 Sterling with autolocker
1986 F150 302, C6, 9" 2.75, Wood Flatbed