Haven't tired these folks but looks like they could just do the whole
panel for you. Prices look reasonable.
http://www.frontpanelexpress.com/

Karl Townsend wrote:

I've canalized an old CNC control and built a new operator's CNC control
panel. It has several push buttons, toggles switches and selector knobs. I'd
like to do a professional job labeling these. The print has to be different
sizes and some of it has to follow a circle around a knob. FWIW, everything
is mounted on a sheet of 304 SS.

Is there any way to lay this all out in some pc program and print it to
something that can be transferred to the sheet metal? Which programs,
materials etc.?

Karl