Dry transfers? No one. There are a few printers who still make dry transfers, but you get the pleasure of supplying the artwork--and shelling out some semi-serious cash for the privilege. (I recently had a custom sheet done at $70 for the sheet.) Water-slide decals are far more reasonable. Stan Cedarleaf advertises here, and can provide you with something that will work. Also Del Taparro (G-Scale Graphics) does vinyl lettering. Shawmut Car Shops also does vinyl and decals. I've used all three, and all do good work.
I am currently having dry decals made for Atlantic digital here in Nova Scotia Canada. They cost me $10 for an 8 X 11 sheet. I would suggest you contact your local printing company, you will be surprised what they can do.
I did some talking yesterday- to Shawn and he informed me he had already given a local printer a program with all the road names. Ok guess I don't need the dry transfers after all. But I did like the way they looked when applied.