Welcome to The Hand Lettering Forum! This is an interactive Bulletin Board on the topics of Sign making, design, fabrication, History, old Books and of coarse Letterheads, Keepers of the craft. The Hand Lettering Forum features links to resources, sign art history, techniques, and artists profiles. Learn more about Letterheads at https://theletterheads.com. Below you'll see Mchat has been added as a live communication portal for trial, and the Main forum Links are listed below.
John,
I am not exactly what kind of gilding boxes you are referring to, but you can see a bunch of metal "sign kits" used by Steven Parrish on this page:
One of them is shown at the top. They seemed to be just ordinary toolboxes he had purchased over the years. Several companies made and make commercial "sign kits". Try http://www.letterheadsignsupply.com
Good luck,
Mike Jackson
Mike Jackson / co-administrator Golden Era Studios
Vintage Ornamental Clip art
Jackson Hole, WY