Good luck finding that stuff. Beavis and Butt-head is an unfinished prototype with only a handfull of cabs in existence. You could go to the annual Ca Extreme show and take a ton o' pics or make your own off the artwork on the DVD box and from the internet. There's also more than one version of the cab and artwork that I've seen. Here's a quick and dirty homebrew I did of the marquee. Needs clean-up, but it's better than nothing.