I'm going to repost this since it's been a while. I have the O-rings that go on the pressure disc of the RCBS lube/sizer and seal it so that it pumps. They wear out or get torn when changing lubes. I ordered some for my sizer and ended up with 100 of them. I'm giving them to fellow Cast Boolits members for free. Just send me a stamped envelope with your return address and I 'll send out a few to each request.
Pm me for my address. Take Care David