I don't know about in the US, but it's available @ Costco in Ontario. I just picked up some last week.
I don't think Benefiber has been taken off the market. In January, Novartis , the company that makes Benefiber recalled a bunch of products, because of cross contamination (bits of one product, ending up in packages of another product). Although Benefiber was not among the recalled products, the factories where it is made, were temporarely shut down. I'm not sure when production resumed, but it likely has.
HW: 386 - RNY: 356.8 (14-Mar-2013) - CW: 238.6 (07-May-2014) . . . GOAL: 199