Found this site that offers professionally made coolers:

BoomCooler

They use a large Igloo cooler with wheels and a very serious amp – this thing is LOUD!

There’s a lot of great discussion going on in post comments and email, so I’ve created a discussion forum to make it easier to have public conversations. It will also help for publishing pictures!

Link: Stereo Cooler Forum

If you have a comment or question, please post in the forum instead of the comments section and it’s much more likely to be read and responded to. Thanks!