well... Locally the Fish Store and Pure tend to get a fair number in stock. Spike's as well although you;ll likely need to have that shipped to you.
As for online you may want to try liveaquaria for one of their "packs". Reefs2go often as inexpensive ones as well, but a mixed bag on customer satisfaction, at least on some of the more delicate livestock.
But rics are fairly hardy and should come through shipping with minimal risk provided they're packaged at all competently. Pay for overnight, though.