Would they have to be Wiccans, or would you take other kinds of pagans as well? We have Druids, Heathens, Kemetics and Hellenists here, but Wiccans are in rather short supply.
I picked that group because it is the one I've most heard of. Certainly, if they need time to breed, I can sacrifice some of the others for now.
And Asteriktos, don't go talking to your friends about this exchange.