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