K-Line Super-Snap track evolved into the Ready Made Trains brand and now what's left is sold under the O-Line Reproductions brand. Same switch, different packaging. Switches can still be found new at Pat's Trains: www.patstrains.com and probably a few others; I bought some from Pat's last fall and their service was excellent.
The track itself may be tough to find, but the switches will mate with traditional Lionel tubular O-Gauge track. The tabs on the switch will get in the way of the tie when you mate it with tubular track, but that is fixed easily enough by moving the tie away from the switch slightly so it clears the tabs.
Keep us posted on your progress.
John
