These lures seem to be pretty hard to come by online. I searched the other day for these and couldn't find much at all.
I believe there is a lawsuit/legal issue of sorts pending against Rensoki Lures-hence I'm not sure if they have continued production on these lures. The other mfg making these lures was Z-Man Lures. I think the two makes offer the exact same chatterstick bait, in both a 3" and 5" model.
I would look on Ebay or it is worth giving Poor Richards Tackle shop a call. They are a small outfit in Erie PA who always seems to have obscure/discontinued/popular walleye lures for Lake Erie anglers.
They have a website but I don't think they do online orders. I would look them up and give them a call. Even if they don't have them they might refer you to a shop that does carry them.