If you are willing to use masking tape and a ruler to re align logo letters before applying them (so I can cut down a given logo into a small letter format, I can get my Bucharest guy to cut anyone logos and mail them in a normal letter. That can't cost more than a couple of bucks in stamps? (I actually have no idea but letters are supposed to be cheap). The printing costs under 20 EUR for an entire bike using high end oracal vinyl.
Btw, have your guys checked AliExpress? They have to offer the service. And one of my logos , I should add, I cut myself with AliExpress vinyl, and it's survived months just as well (I just trust the car stuff better).