For "Switcher Scheme" locos, you want to use http://www.nscalesupply.com/MSD/NSS-60-28.html (rather than 60-1128) N scale Supply's custom decals, as they are a dead-on match for Modelflex D&RGW Gold paint. That is for repainted GP7/9 SD7/9, and all factory delivered GP30/35/40/4-2, SD45/50/40T-2's. I used them on all my units that I repainted. They are excellent. 60-28 is for D&RGW painted units that wear the darker Anschutz Orange; the former Conrail GP40's 3131-3153 (the ones without nose MARS lites). 60-4083 is a decal set specifically for GP60's.
