I’ll add a vote for Screen Specialty Shop, aka SSSink.com. My Pinarello was restored by Tom Kellogg at Spectrum Cycles last year and he spec'd SSSink decals over the ones I’d supplied (VeloCals).

Are you having your frame painted? If so, I’d suggest talking to your painter especially if you plan on having the decals buried/clear coated. The decals I supplied my restorer were rejected partly for quality and because they would have been incompatible with the paints/clear coat used. Would have saved me money if I’d thought to speak to my restorer first.