Chris:
Kinescopes.com is still very much alive-- although the domain has moved to a new server, of late. The same web address will still get you to the \"Big-4\" page, though:
http://www.kinescopes.com/G_T_big4.html(yes-- I know we're overdue for an update....) :^)
To answer your question, though, the known surviving color primetime TTTT eps are:
1) #N-464, taped 12/21/66, (with a probable broadcast date of 12/26/66). Panel is TP, PC, OB, KC and the first game centers around Native American rocker Vince Clifford.
2) #N-475, taped 4/20/67 (orginal broadcast date 4/24/67). Panel is TP, PC, OB, KC; and the first game features former American POW/defector Morris Wills.
Hope this helps!
-Kevin