Thanks for the responses. I ended up going to my local lowes, and picked up a small box with about 10 o rings in it, it is labeled as No 41 o rings. Im not sure if they are exactly correct, but no leaking since I put it in. Before if I tilted the Reo in any direction, juice would run from under the the atomizer out and down the sides. That has only been happening for about a week so I don't know what has changed.