Thanks for the input. I had noticed Coffer's was quite I asked.
If the fabric wasn't so expensive I'd just go to hacking away.
Hence, I wanted more information.
I might actually get some $1 fabric from wally world and do a mock up.
Another way I was thinking of doing this would be to attach the fabric to a piece of ply and then fit it into the back. I'm not sure if this would help me out or not, but 'if' I was to make another box, I could transfer the shroud....