I have found exactly what I'm looking for from Microscale, Thank You so much for your help!
Happy Modelrailroading!
If you want to put those yellow patches on your SP units, Microscale Decals might have what you need in their TF-16, yellow trimfilm decal sheet, which is a 4.25 by 7.25 inch solid yellow piece of decal film from which you cut pieces to the size you need. If the yellow of the TF-16 is not the correct yellow for your need, get a piece of clear decal film and airbrush it with the appropriate yellow paint and cut as needed. Apply your numbers on the patch as you would a painted surface.
Hi Guys N Gals, I have a project that I want to do, I want to UP patch my SP diesels, now I know that the UP engine numbers that will be on my SP Locos are on a yellow background, the decals I'm getting do not have a yellow background, my question is.... what can I use as my yellow background for my numbers??? card stock??? I don't know I'm working in Nscale. Thank guys n Gals for your help. Trainsrme1