Just did a little searching and there seem to be a few websites that are currently selling them. Liveaquaria.com has a Zebra mantis shrimp (lysiosquillina maculata) in the Diver's Den, which is a bit pricey. Sealifeinc.net seems to have odontodactylus havanensis in stock currently but don't know how reputable of a site it is. The reviews did seem good. Marinegarden.com had various mantis for sale as well. My LFS has had luck getting Yellow Mantis Shrimp (pseudosquilla ciliata) in recently and really nice sized specimens. I could ask them who their wholesaler is if you'd want your LFS to look into ordering from the same wholesaler instead of you ordering online. Don't know if any of this helps.