Quickclip makes similar stuff, and niteize makes an adhesive based clip.

Barring that, you can fill in etching like that and resurface. It's a pain in the ass, but imprinted stuff like that rusts a good bit, so people have had to do it. Quick and dirty version, you throw down some jb weld, sand it smooth, then paint with a decent enamel.

I've used the Nite-Ize Eclipse on several small sheaths and other odds and ends and it seems to work just fine. You probably don't even need to order one from the internet to start messing with it. My local Lowes seems to stock them in store.

It does have an "NI" logo molded into it, but it is both fairly discreet and also a bass relief, i.e. it's raised from the surface rather than embossed. So if it really bothered you, you could just sand it off.

Or you could declare that it actually identifies you as a member of the Knights Who Say...