I just popped on real quick and saw this thread - shame I missed it. I made a few bezels, and I turned it into a bit of a construction line.
As long as you have an art program that saves PNG files and use PSD files as a source (Photoshop), have Winzip (or similar) and know how to add files to a ZIP, and know how to rename a file - you can easily create your own bezels for use in MAME with my templates.......
Still, seems like I'm far too late here. For my Bezels I edited the LAY files for the first 3 or 4, and never touched them afterwards for the next 100+ ........