Ralph Mowery wrote:

Years ago there was a company or two that made some dry transfer/rub on
labeling. They you could get some with electrical names such as volume
control, antenna and such. Now all that seems to be around is just
single letters.

Does anyone know if you can still get the full labels or a good way to
label a painted cabinet ?

Letraset. But this business of course has diminished and such special
purpose labels, for which there once was a market, are of course the
first to go.

Today you would make a design on a computer and then use photographic
techniques to transfer it to a front panel. Services that do small
quantities at reasonable price are available.