I went to my local engine head reconditoner/engine machinist and they had some in stock that fit - not sure off what car but I made a 12mm spigot with a 7.95mm parallel section and asked them to find a seal that fit.

I installed them and they work - no more oil burning at idle/revving then shutting throttle (high vac.) situations.

Carbs run a tad rich at idle and a tad lean at WOT (need a smaller pilot, drill main to No. 42 drill and raise needle 1 slot).

Just as I rolled into the driveway and went to turn the engine off the car just ran out of fuel...never trust a 1200 fuel gauge.