I make my own. I use a 4oz trolling sinker with a large split ring (like for car keys) on one end. In that split ring I have 8, 6" lengths of small chain and a large snap. On the other end I tied a spool of construction line (yellow) with arbor purchased at Lowe's. When I get hung up, I just put the snap on the line, let it down to the lure, jiggle it a little (if the weight dosen't knock it off) to hook the lure hooks with the chain, and pull it loose. I have one in each boat and one in my tackle bag. All the parts were cheaper than the production model retrievers before mentioned.