My (kids) are nearing their 50s, and my wife is known to save everything from their childhood. Yesterday she pulled this out of her collection(s) when she witnessed me struggling over one of the various woven pouches I'd seen on the forum.
The whole rig is made of plastic and I doubt if they are made any longer; but, after reading these instructions I threw a piece of mason's, nylon line into the gizzmo, and discovered that it works. So, for what its worth, I thought I'd share this with you all.
BTW: One could easily be home-made using a 4" piece of PVC pipe, or a drilled out piece of dowel rod.
Cheers,