I couldn't find them either, and if I recall correctly the ones from LMC didn't fit. I ended up finding some at the junkyard. Pulled them from a Dodge pickup...I forget what year, but probably a 2005-2010 ish. I just walked around the junkyard one day and grabbed gas door bumpers from various trucks until I found some that were close. The Dodge ones fit the hole but were a hair too tall...which was easily fixed with a utility knife.
PS: The cab mounts in the LMC catalog were incorrect for years...and they probably still are lol, I haven't checked in a while.
1994 F150 4x2 Flareside. 5.0 w/MAF, 4R70W, stock.
1984 F150 4X2 Flareside. Mild 302 w/ 5spd. Sold.
1980 F150 4X4 Flareside. 300i6 w/ 5spd. Sold in 2021.
1980 F100 4X2 Flareside. 351w/2bbl w/NP435. Sold in 1995