Dee, if you can't come up with the O-ring short of buying the whole mess just make your own, I do it all the time. Napa sells bulk o-ring material by the foot both square and round. You just cut it to length and connect it with super glue. Sounds funky but it works very well. I use glue together o-rings on 3000 psi hydraulic components with out any problems. Once the glue sets the joint is stronger than the rubber.