SJ, until those modifications come to pass, you can make a few light strokes with a precision file on your molds to accommodate 22ga wire and have high quality homemade keepers on these jigs. I did this on the old erie/stand-up head years ago. I use pieces of 22ga wire about 1.25 inches that I cut myself and I lay these straight pieces along the back of the hook when I'm casting. (I've never had one pull out on its own or by a fish.) Whenever I would use one of these modified jigs, I would just bend the exposed end of the wire with a pair of needle nose pliers to make my plastics keeper.
NOTE: I emphasize FEW and LIGHT when filing because it doesn't take much... and if it is done right, you will have no lead leakage if you choose not to use the wire. You BARELY want to take any material off the mold... (it really doesn't take much for 22ga wire)... you maybe even could do it by scraping backwards with a straight blades screwdriver.
