Decals are tough. 90% of all decals out there are digital. Basically a dot matrix print. Some can look great, and a lot are junk. They will also fade in the sun unless there is protection on the decals. The decals I run are silk screen. I only run early decals because up to 1990, all the decal sets were the same.
there is a guy in the UK that does very nice digital decals: