I make all my own releases with Scotty Powergrips. The cheapest method is the buy the Clips bulk and make your own. I make them with a 60 inch lanyard, on a modified trolling snap so it doesnt travel vertically on the wire.
Silver Horde has a big bucket of unrigged clips for sale @ something like 2.99 a piece. Buy a bunch, get some crimping ferrules, rig em up on some 120# test, and your set. Way cheaper than paying 10.99 for a single 60 inch rigged clip...