Does anyone know of a source of decals for the side number boards on Stewart FT diesels?
I would try Microscale decals, the seem to have everything.
I’ve used the Woodland Scenics dry transfer decal numbers; gothic for the front number boards, roman for the sides (which is how Santa Fe did their locos). You can get number-only sheets that have the numbers in at least 4 different sizes.
If you do use the dry transfer decals, be sure to coat them with a clear flat or glossy paint – I didn’t at first, and learned the hard way that they rub off kinda easy if you handle them the wrong way. [V]
Microscale has a specific decal set for FT number indicators, including the large, side-mounted panels. It’s their set #87-794 for HO, #60-794 for N.