This will be useful to only a limited subset of you, but here you go. The Gibraltar memory lock, reimagined for 3D printing.

Intended for 1.5" tubing, which is the standard for such drum racks. The retaining lug is only on one side, to facilitate printing.

Let's face it, these will be a LOT lighter than the metal ones. And you can print them whatever color you like, which (to me) helps with setup of my drum kit.

I've had success printing these in PLA, so long as they're only used for position and not structure.

If you find these useful, I'd love to hear from you. Cheers.