I own a trio of original British Martini rifles that came from the Nepal Cache...this being where both Atlanta Cutlery and International Military Antiques get the guns.
I've got other arms from the cache too..and the British guns are the way to go if you want a shooter. The native Nepal made Francotte and Gehendra Martini-style guns apparently have a tendency towards small non-standard bores...and the barrels are hammer forged/welded iron. The solid steel British rifles are far superior in manufacture and materials.