The old Mil-Tech Thunder - Five .410 revolver Holster (converts from belt to shoulder with the included kit) should work and they have a storage compartment loops for 5 extra rounds. I see the holsters on ebay, gunbroker and auction arms all the time. The gun is no longer Mfg by Mil-Tech. They sold the design to Springfield Armory (I think they wanted the Air Crew Survival Kit Contract). I have NO Clue if they are really going to build it or not. The Mil-Tech web site is no longer up sad to say..... you get re-directed to "Netflix." I believe Uncle Mikes (slings, swivels, holsters etc) made them for Mil-Tech, you may try them to see if there are any laying around the we don't need em anymore bin.