Originally Posted by Camilo

I had excellent luck working directly with a local sign shop - they do custom pin striping, etc. for cars, logo and promotional stickers and door decals for commercial vehicles, etc. etc.

I'm absolutely positive they could produce a quite accurate version of your decals simply from the photo you posted above. They had great designers on staff who knew how to use the software. My decals were quite a bit more difficult with stripes, different fonts, some little details that were hard to duplicate.

My bike is an uncommon old Italian brand (Sannino) and the normal online decal sources did not have decently accurate versions.

I gave them photos (which I got from various online photos, sort of like what you posted) and worked through a couple of revisions and they came up with decals - which to my eye - were identical to the original (see below)

They also have various materials and inks and, like I said, are experienced with making stuff for vehicles, so the durability is not a question.

I think the entire project, including printing a couple of interim versions from which I had them make changes, only cost me about $50, and I have two sets plus the electronic files in case I ever need them again.

That's what I'd try first.

Another idea - do a search on ebay for the name and model of your bike. A year or two after I did the above, I found a set of NOS decals for my bike from someone in Italy for about $35 shipped. I found that my current decals are pretty darn close - close enough for anyone except a full-on restoration. But I'm now going to have my local guy do exact copies of the originals, give me a set plus electronic files, and then I'll put the originals on the bike.