AZ,
I beleive the product you're looking for is called Wonder Thread.  It's basiclly a single strand of elastic thread.  We use it to wrap sardine fillet chunks to our big Kwikfish for Salmon fishing.  You can also find instructions on tieing a bait loop with your leader.  Similar to a snell, but with a loop about half way which you can wrap a couple times around the bait and cinch dow tight.
JustDave

Tieing a bait loop.  This is a 6/0 hook and 20# leader so you can see it.

Start by running leader through hook eye and leaving an inch or two over the hook shank.

Wrap long end of leader over tag end several times.

Feed leader back through hook eye and pull out slack to leave a loop.

Hold wraps tight, loop in your other hand, go over hook shank and leader that is back through eye.  Do this several times, keeping everything as tight as you can.

Pull tight from behind the eye.

When you push the leader back through the eye, a loop is formed.

A peice of yarn can be tied on to the loop.  This will help get the loop opened and the yarn will tend to stick in a fishes teeth.  Trim short.  We use a half of strand and clip to about 1/2" on each end.

I hope this doesn't confuse you too much.

If you have trouble finding the Wonder Thread, let me know and I can pick some up and send to you.  It runs a couple bucks a spool and all the tackle shops in our area carry it.
JustDave