Those F units are what got me interested in the NYO&W. It took me about ten years but I finally was able to get a set of F3A and F3B, and a set of FTA and FTB. The FT's are on the left and the F3's on the right. They were made by Stewart. The A units are powered and the B units are unpowered.
It looks great to me. The Erie's contrasting black and yellow and partially painted nose is extremely tough to execute. I tried it once on an RS-3 and the result was just awful. I threw the shell away and never tried it again.
The O&W may have more fans today than it had in its prime. I love your F's! The road owned few freight cars in its latter decades and photos of them are rare. I cobbled together a mix of decals and painted this N Scale hopper some years back.
Finding O&W stuff can be difficult. I have been collecting decals and dry transfers for O&W with the hopes of custom decorating a steam locomotive. I have purchased a couple unlettered locos and lettered ones I plan to change. Then I found this puppy on Ebay. It is an old Mantua loco. It runs pretty well. I still have a few tweaks to make on it. I only see 36 FT wood reefers and boxcars for O&W which I have acquired several. As of yet I have not gotten any hoppers but it is only a matter of time. I have one caboose at this time that is an Atlas Trainman model. I am in the market for at least one more. I apparently have a fetish for railroads that have limited models available as I also model the Pennsylvania-Reading Seashore Lines and the Lehigh & New England. LNE stuff is fairly easy but PRSL is like O&W; hard to find.
I feel your pain. Years before M-T released their model of an L&NE hopper in N Scale, I did my own pair. There was an N Scale decal supplier called Northeast Decals and they were the sole source for excellent anthracite road decals. Unfortunately they closed up shop long ago.