I know I've been checking locally, and haven't seen any. It looks like, now that Arch (formerly Olin, ie HTH) is in the hands of an ex-Biolab-er, cal hypo is going down the drain.
It *can* be ordered, fairly economically, from Leslies. Look for their "Power Powder" line. Watch out for the other granular products; they are also selling the same blended goop as everyone else.
Power Powder pages
http://www.lesliespool.com/
There are probably other online sources as well, but watch out for shipping costs. Cal hypo can be quite expensive to ship, because of hazardous materials regulations. Leslie's seems to have some kind of deal with UPS that keeps the cost down -- I know the surcharges with FedEx Ground, which I use, are horrendous.
Ben
"PoolDoc"
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