CDS Transfers offer a few options if you’re ok with dry transfers rather than water slide decals. I’ve been using some of their transfers recently and I’m pleased with how they’re coming out.
I it also possible to put the dry transfer on clear decals film if you don’t want to apply it directly to the model. This does run the risk of building up a thicker than ideal layer of lettering, I don’t know if that would bother you or not.