I also cut decals and have for several of the NASA members who could potentially vouch for me if necessary. I'd be happy to cut numbers for your car. I have several colors and if I don't have one you're looking for I can usually order it and have them in a couple of days. I'll be at the Gateway event and could hand deliver them but if it were me, I'd live to have them before hand and would be happy to mail them to you. $10 for 2 numbers on each side (4 total numbers) and $15 for 3 numbers on each side (6 total numbers).
Off the the top of my head I think I have white, black, blue, red, pink, orange, yellow, gray, green, and a carbon fiber pattern.
If interested, my email (which is also my paypal) is firstname.lastname@example.org
or message me here.