I got in local hyddraulics shop (Boise, Idaho), they call them Chevron seals. If you cannot find them, email me and I will send them to You. Bellanca factory still has some parts for the tailwheel, I got them about a week ago. You could also try McMaster Carr in California, They have every single O ring used on Cruisemaster.
Jan Zatloukal, zatloukal@cableone.net