@udb23 Thanks for sharing the original cardboard bezel scan and the bezels that you created based on it. I wanted something slightly different to the bezel that you shared already, and came up with this:
asteroid-w-overhang-example.jpg
I'm using lr-mame2003-plus, and wanted an "integer resolution" bezel to support this.
I found that lr-mame2003-plus has better resolution core options than fbneo in my quick comparison. Two resolutions that the core offers that work well for me are 640x480 (with 2x integer scaling in retroarch) and 1280x960 (with the beam width = 2 set as a core option).
If anyone is interested I've put my bezel attempts here: https://github.com/busywait/retroboxes/tree/main/overlay/Asteroids
There does seem to be a little problem with letterboxing (black bars) at the top and bottom. Does anyone have any idea why lr-mame2003-plus doesn't fill the whole 960 height with the game? I ended up setting a custom resolution of 1280x1060 in the game.zip.cfg that does fill the space.