Greetings, Dr. John. I used Mark Montgomery in Arizona at http://www.britishmilitaryequipments.com
, but come to learn there is also Mr. Bill Donner at Heritage Leather at http://www.heritageleathercw.com
, in North Carolina.
Both of these gents supplied me with all of the different leather or buff accoutrement items I needed for my Crimean & Indian Mutiny 93rd impressions.
Both were sticklers for correctness, their items were affordable & both a pleasure to deal with. I would spend my money on their goods again.
Also, there is a Mr. Glendon Hovey up in Canada who does mostly 1812 stuff but can make almost anything, http://www.sewhistoric.bravehost.com
, I highly recommend that you contact Glendon if there is an impression item you need that you find and haven't been able to acquired.
Cheerio, Johnnie, 93rd Highlanders.