Source for a part that's similar to QGJ emitter?

[cayman shen]

I've been looking at door lock trim rings and the like for a found metal part that's as close as possible to emitter on the TPM QGJ, OWK, council, etc. sabers. I want to try to scratchbuild a few of these sabers, and I'd need a ton of these beveled rings, so damned if I'm making this part from scratch every time!