Hi Dennis. Once had a kit and handles to make my own. I may have gotten iy from MC-Master Carr. The kit is long gone now.
I have a lot of old wheel weights from my auto shop. I figure to melt them down and I will make a mold as you did.
Nice job. Thanks for the video.
donmittlestaedt
I was planning to do the same, but out of wood. Looks like your method will be infinitely reusable!