Wine stopper grommets, o-rings

On aliexpress.com it is easy to find metal wine bottle stoppers. I would like to buy the rubber or plastic pieces and make my own on the Clausing-Colchester lathe. Does anyone know a source? Perhaps I could teach a class if I could find some.

Another possibility would be various sizes of food-grade o-rings.

Would these work?

They appear to sell essentially the same thing at Rockler, but for more money.

http://www.rockler.com/silicone-bottle-stoppers

You may want to at first try the ones DMS has so you know the right size. The last time I saw the plastic case that held them they were behind the Haas in the OD green drawer unit BUT near the top in a missing drawer that is more like a slot. Upper RH side as I recall.

Seems pricey. But thanks.

I suppose. They are about 90 cents each since it is a package of ten.