Go to a local sign shop - the kind that makes decals and logos for commercial vehicles and custom stuff for cars. They can produce what you want in durable OEM-like decals. Especially if you have the bike so they can look at the original decals for font, color, layout etc. I had excellent results having a local company reproduce decals for a bike. I later found some NOS OEM decals on ebay and they were an excellent match (couldn't tell the difference, even up close).