Hi Steve,
Similar issue on my Sansui, age and usage broken up white lettering. Tried to see if it can be repaired by a professional body or silk printed etc.. very expensive.
Instead..
I used DecalPro fx. Have a read of it on their website. You would probably will have to take the front panel have it on a workable surface as there will be delicate work.
You would probably will have to take a good look /snaps at the existing font, size and where they are, make up the new set on normal white paper using laser printer, overlay until you get a good match.
Then practice before touching the panel as you will have to remove the old decal. Removing the old decal is so easy, instructions are also included. Enclosed is a typical result, All of the white lettering was removed and re-applied.
Mano