Interesting... There used to always be a handful of old Belding & Mull Visible Powder Measures on eBay but there's nary a one today. I found ONE on gunbroker, and it seemed a bit pricey to me: https://www.gunbroker.com/item/900019992 I have maybe 8 or 10 or 12 "extra" ones in the back of a closet, but have no inclination to sell any. The attachment method is atrocious. They want to spin around instead of cycling... but a couple of strategically placed small plywood strips fastened to the mounting surface will stop that.