Just wanted to be sure everybody saw this on eBay. They may all be for newer plastic sets, but seller says he has others:

http://cgi.ebay.com/Chroma-Bright-Rebuilt-Color-TV-Picture-Tube-25VFM-FYP22_W0QQitemZ370289368555QQcmdZViewItemQQptZVint age_Electronics_R2?hash=item5636f75deb