a friend of mine gave me a bag of these sealing rings. They came from the Aase Bros sale way back when. New, old stock in the Porsche bag. Part number is 901.107.291.00 and they fit all 911's from 1965 - 1973 and also the 914-6. List is $36.75, I'm asking $25 each, USPS 1st class mail included.