[Rand Al Thor]

I would assume that there is probably NOT an existing source for them. However, I think that band logos would be easier to come by than good high quality backgrounds. Every band has a logo, even if it is just the bands name in a special font. The fact that they would not need to be of such high resolution would make them much easier to come by. You would need to come up with some sort of standards though as I discussed earlier. Like dimensions and that the logo MUST fill at least one aspect (either vertical or horizontal). They should be .png's so that the rest of the space can be transparent. They should only be EXISTING logos. No "I think this would be a cool logo for band X." That is all I have for now but there are probably other things to consider. Cheers.