The source I am checking for Crawfish is: http://www.texascrawfish.com/.
They say they are not large enough to sell, yet. Darn Katrina and Rita!

I just bought 170 to 200 Ghost/Glass/Grass Shrimp. We'll se if Ic an get a population started in the 78 Xmas trees I sunk. I found 4 sites that sell them, but the first site had the best price, overall. We'll see how it goes.
http://liveaquaria.com/product/prod_display.cfm?pcatid=1468
http://www.livebrineshrimp.com/
http://store.yahoo.com/fish2u/scgs.html
http://www.aquatic-store.com/en-us/dept_307.html

--Kevin Mc
It's not about the stomach. It's about the fish. Take care of the fish and the stomach will be fine.