In someone's conversion thread, they had a great description and some pics of a seat idea they'd copied from a friend's design. It was a bench seat that had two arms attaching each side of the seat back, and the back swung down in front of the seat to seat level and stabilized itself on the arms to make a bed. The person who posted them had made some nice-looking metal arms, and the bench looked awesome.
I've tried doing a search, but I just can't seem to find it. Anyone remember/claim it?