Philco 51-1207 with 12WP4 7 pin miniature base on e-bay.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=3638&item=3286181368&rd=1

I saw that, I already have one: http://www.vintagetvsets.com/51-1207.htm

There is another on Radiolaguy's Site: http://www.radiolaguy.com/philco51PT12.htm