Custom rear panels

[skid]

I was going to reply to the other panel thread, but didn't want to change the subject, or hijack the thread.

Has anyone built custom side panels for their Blazer? I am going to build my own panels with built in speakers and storage areas and am interested in looking at other's efforts for ideas. More specifically, I am interested in how the panels are mounted to the body, and exterior finishes (vinyl, leather or carpet, etc.).

I have a double wall top, and would need access to the bolts from under the bed flange. How did the factory address this problem? How did the factory mount the side panels?

Any and all pictures would be appreciated!