Yeah, I'm having problems finding it locally, too. The mediocre Hobbyland up by the local mall ("local" meaning 35 miles one way) has been out of Tenax and Ambroid for months, and par for them, have no idea when more is coming in. Same goes for my good hobby shop on the west side of Cleveland.
Must be those darned Libyans, drying up the solvent glue market.