CNQG still sells these — 22, 26, and 31mm size
http://www.cnqualitygoods.com/category.php?id=24
Boyou (brand name, shiny chrome clips stamped with their name)
EDIT, hat tip to antiparanoico below, they’re available at http://intl-outdoor.com/boyou-stainless-steel-lobster-clasp-claw-p-532.html
— still listed at AliExpress but none actually for sale
— https://www.aliexpress.com/store/product/10-pieces-of-Boyou-Stainless-Steel-Claw-Lobster-Claw-For-DQG-EDC-AA-AAA-flashlight-Key/925745_1017660517.html
Berkeleypoint (McGizmo reseller) is still there and has the McGizmo clips
— Mini / Micro / Nano / Pico Clip - Stainless - Berkeley Point & Suncor Stainless
Don M’s web page is still there: http://www.mcgizmo.com/
I don’t see his clips for sale there. Great marine animal pictures though.
There are other shapes and sizes similar to these out there; some discussion and pointers here:
— https://www.edcforums.com/threads/frugal-alternative-to-mcgizmo-clips.99795/
Caution: any with too weak a spring, if hung from a belt loop, can twist so the cloth presses the gate in, and lo, you’ve lost something.
(same way climbers pop a rope out of a carabiner, by getting the rope over the gate so it folds in)
I like McGizmo’s the best for feel/pressure/reliability. Pricey, though.