Gil can do the decals probably, look up gil m on here and he can do most.
Decals on cranks aren't gong to last long, some of the 90's era ones had them, Grafton did once, but think the idea was dropped as they scuff easily.
Even the dark blue Cook Bros ones has lettering that was uber scuffed before I got them anodized. They weren't decals though and nobody was sure how it was done. I've put out a question to a local laser etching/cutting company to see if they can help.