I just listed two unused Jennings Vacuum Variables on e-Bay.
GCS-100-15S, 5 - 100 pf @ 15 KVDC, and
UCSV-110-15S, 8 - 110 pf @ 15 KVDC.
You can see them at:

http://cgi.ebay.com/ws/eBayISAPI.dll...ADME:B:LC:US:1

http://cgi.ebay.com/ws/eBayISAPI.dll...ADME:B:LC:US:1

Thanks, Dick, W1KSZ