I had an ammunition box stenciled for the Leavenworth, KS Armory Depot, 1865, cal .56-50 Spencer made by Charlie's Boatworks I gave as a door prize a couple of years ago at the Dept. of Missouri Muster. I modified it by installing hinges. Built to the official dimensions, painted, stenciled and delivered for $45.00, a fair price.
Our Capt. G. W. Strong was making similar items, too. Very high workmanship and research was spot on. Plus he's a very personable, loyal GAF member. I would recommend him.
Also Sgt. John Chapman, I believe, has made similar items.
RCJ