I can recommend Solidesign for creating a custom decal:
http://www.solidesign.bizland.com/decals.html
They made decals for my RCA CT-100 TV and other sets. Great work, reasonable prices.
I’d take a good close-up photo of the decal that you need, with a ruler by the decal to show the size, if possible. Email that to Scott and ask for a quote. He can clean up the image as needed and print you a whole sheet of decals. You’ll end up with extras, which you can donate to ETF or sell to fellow collectors to recoup your cost.
Phil Nelson
Phil’s Old Radios
https://antiqueradio.org/index.html