Sorry if you've already found a source, but here's one: http://www.aquatic-store.com/
I've never purchased shrimp from this supplier, by the way. I've only been tempted to order cherry reds from them, since this is (by far) the cheapest I've seen anywhere. There's a LFS I can easily get to that sells Amano shrimp at $5.50 for three. You can't find them locally?