You can make your own. Take about a 4 oz. mooching sinker, and using split rings, attach some large treble hooks to each end. Also attach a snap connector to each end. The only other thing you need some stout line to attach it to. When you get a lure hung up, open the snap connectors on your retreiver, an clip them over the line attached to your lure. Let the rig slide down your line until it gets to your lure. Raising your rod tip up high will steepen the angle and allow the retreiver to slide down quicker. By jiggling the retreiver line and your rod tip, you should be able to get those treble hooks tangled in your lure. Then haul on the afore mentioned stout retreiver line, and try to knock or pull your lure free. Good luck!