I think I'd just buy an old dirty original from Atlanta Cutlery.
www.atlantacutlery.com/s-72-guns-rifles.aspx
There's a book about the guns they bought.
http://www.atlantacutlery.com/p-1245...over-book.aspx
"The full color narrative of the hunt to save the forgotten arsenal of the Royal Nepalese Gurkha Army. Stored in an old palace, Lagan Silekhana, since 1839 this was a 30 year quest completed in 2004 saving more than 50,000 antique firearms including over 150 cannon"