Well, let's see, since enkamat is used primarily for erosion prevention and root reinforcement, outside the hobby. Maybe plant nurseries would have it. I don't think you're going to find it at a shop. Maybe another reefer might have some. I dunno, it's an industrial product, so that's probably where you're going to have to look. Try septic, pool places, landscapers? You're probably going to get stuck paying for a bail of the stuff if you get it locally. That might work for you if anyone else needs it.
DJ