I got new stripes for my 750K1 from Reproduction Decals. What they initially sent me did not match what I had so they told me they could make a decal from my tracing, which is what happened. If you want something special, give them a call and see what they can/will do.
The painter also said he could paint any kind of stripe that I wanted, and also said if he ever did it again he might prefer that method.