I'm sure this isn't a new question, but I couldn't find it in the search anywhere. A lot of old socket sets came in metal trays with a flip-top handle looking piece that locked them in. Are these trays available anywhere as stand-alone products?
Most of my Craftsman sockets (circa 1970) still reside in their original metal trays. They are not hard to build if you have access to a small sheet metal brake.