Trochus snails in Iowa?

[acrouse]

Hello-I was just wondering if anyone knows of any LFS in Des Moines or surrounding areas (or any Iowa fish store) that carries trochus snails. Preferably the banded or black foot trochus. I can only find them on liveaquaria.com and did not want to pay that much shipping for snails.
Any suggestions would be greatly appreciated.

thanks jolene