Try a clock repair shop. They can order different sizes of glass. Might find one searching the internet?
Norm
:I am wondering if anyone knows where reproduction dial glass is available. I was restoring this radio/console and cracked the 3.75 inch convex glass. I know the larger Zenith dial glass is readily available, but this console has a smaller Zenith round dial. Any help is appreciated!
Try Bill Turner at:
http://www.dialcover.com/glasslist.jpg
Terry F
Bill Turner may not be able to help with glass anymore... I sent him money (approx $18) to buy my convex glass and waited and waited. Then he said the place he orders from was not responding. So I gave him more time. He said he couldn't ever get his supplier to respond so he decided to give up and refund my money.
That's when I finally went to a clock repair place on-line searching under "horology" and bought the exact glass I needed for only $4.95 and it was shipped fast. Cheaper faster and no hassles.
http://www.clockworks.com/cparts.html