I got them from RatRacingGraphics.com. Brian will take care of you, they are big NASA supporters along with other clubs. The above proof is what I purchased, x2 for everything. Total was just under $90 shipped. Check out their site and email them with your ideas and styles you want. I have access to a vynil cutter and have made my own #s in the past, but I wanted a 2-tone look which the one I have does not work.
After our discussion last night about brake fluid, I think I'm gonna try some of the Motul rpf600. It has like a 618* boiling point dry and is compatible with DOT 3/4, a lot of high temp fluids were not compatible a few years back. It's a little pricey, but what isn't in this sport.