Do you need the primary kit? I have a secondary-only one for sale. It was one of a batch that were made for Ted Kellner out of California many years ago. Ted used to have primary kits for them too, but not sure if he still has any left. I always liked this stop as it barely slowed down the car when it was open, compared to an open spacer.
I'm running "old school" style with the stop activated by a shifter switch (no timer), and needed a little more stop so I switched to a Dedenbear with primary kit.
I'd take $140 plus shipping. 503-407-1388