I got them at a shop up here in concord. are you the same bassnet as the one on allcoast? that's kind of a ways from you. http://www.canyon-plastics.com/ check that out, I think you can order them directly from their site.
The place I bought mine from (the shop near the keys at Clear Lake) had these special jigheads you're supposed to use. They're kinda weird, they've got a flat, sort of pill shaped (flat, cylinder) leadhead which is vertical. It fits in the nose of the giant tube, and the eye pokes out the top, and the hook of course is rigged in the bait. Works out pretty good. Don't ask me where else you can get em, but... -Brian