Buco parts are hard to find. The closest latch I have found and have used is
http://www.vintagevibe.com/p-84-pian...sic-style.aspx
I only have some old original nuts & bolts and one complete set of Buco bags waiting to be restored. Although I have finally figured out how to build replacement lights that take off the shelf 6 or 12 volt LED bulbs.