I think Andee has had some hatch. Not sure if she has enough to sell but maybe. I think people use the escargot snails dont they? You might be able to find them in an international grocery store. We had a big chain store called G-Mart. Chain went out of business) and I think they had them there. After seeing their "live" fish (barely alive) and octopus (drugged to keep them in an open top tank) I don't know that I would feed any of that directly but for breeding stock...
It depends on where you are. If you live in California or Florida you can collect some in your garden keep them, breed them and feed of their offspring that you raised properly not the adults you found.
Elsewhere Snails in the mail a site sponsor may be able to have some sent to a restaurant supplier near you or ^^as above.