Hi Fredric,
Here's a link to all the known CTC2 chassis serial numbers, which of course is the chassis used in the RCA CT-100. If you wish to share the s/n of a set, I would very much like to add it to the list.
http://home.att.net/~pldexnis/input/...mbers_List.htm
Sadly, there is no commercial rebuilding of the 15GP22 available... yet. However, year-by-year we creep closer and closer. Here for example is a link to a photo of one of the new 15GP22 stems that were manufactured in 2000.
http://home.att.net/~pldexnis/input/15GP22_new_stem.jpg
Pete