I have a Anyvape Davide tanks and really like it. Now my problem is they come with 3 sizes of O rings, the one to seal the glass tank with the others smaller and used through out the thing. I'm looking for the smaller ones as I got only a couple with mine and they don't hold up well depending on where they are located. I've tried Lowes, other local hardware stores and B&M locally as well as on line with no luck. Anyvape has tanks and such for replacement but not the O rings, go figure. Any suggestions on where I can find them?