I'd like to start a thread where people can post MAME artwork they created that maybe isn't up to the normal quality standards but still fills gap in the MAME artwork (especially if it's on the "Most Wanted" list). Maybe the source material is low res, or maybe it doesn't exist at all and you had to fabricate it. The only rule is that it doesn't already exist (that you know of) and thus is "better than nothing".
I'll start with this bezel for Ultratank. It's from a photo in an old eBay listing. It's pretty low res (instructions are unreadable) and I had to correct the perpective to make it "flat" but it's still quite useable.