I believe that's a chain as well (we don't have them here) - but doesn't hurt to look into it, maybe they have more info available on when they get chicks and what's available. I buy my chicks and supplies from the same 2 or 3 family run/co-op run stores - they cost a bit more but they're...
If you have other smaller feed stores (not TSC) a lot of them post online lists of what breeds they're expecting and when. I have never had issues picking a date and getting the breeds I want.