Hi to all,
Hi Dave A,
This gentleman advertises on Antique Radio Forums, is specialized in belts and a Zenith specialist :
https://www.qualityradiobelts.com/index.html
I have no ties to this seller, his services seem praised on ARF.
see advert banner on the right, bottom of homepage.
https://antiqueradios.com/forums/index.php
Hope this helps,
Best Regards
jhalphen
Paris/France