Anyone know of any good overlay images for NES, SNES, C64, Switch, etc?

[Cloudster]

I am trying to find some very nice overlays for the NES, SNES, C64, Switch, Amiga, Sega Saturn, and any other system that has pretty much the same resolution for all their games. One universal overlay for each console/system. Preferably in 4k. Can't seem to find any nice ones. Anyone have links to any good sites or resources for this sort of thing? I don't really like the ones that Launchbox downloads and installs and would rather use my own.

[dragon57]

Have you seen these? 1440p, but upscale pretty well, plus you can use a number of AI upscalers that do a great job.
https://github.com/libretro/overlay-borders/tree/master/16x9 Collections/Nosh01 1440 Plain