I get all of my Taylor refills at Amato Industries. Same day shipping and order process updates via e-mail. The direct link to the product you're looking for is here for the 2 oz. They also carry it in 16 oz which is what I buy. Amato is located in MD.
Another vendor that's mentioned occasionally is SPS Pools&Spas in IA. I like the layout of their ordering pages a little better than Amato's.
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