Lastly this brand new Raytheon CRT arrived at my work today!
Shown here next to the set it's going in.
I bought this from a guy who has a bunch of CRT's listed on the Early Television Site.
http://www.earlytelevision.org/info_wanted.html
the listing is a little more than half way down, just use "Find" and enter "Cathode Ray"
I was reluctant to buy something from someone I didn't know but it turned out fine so maybe if you need a tube on his list you can work a deal.