The reason you can't find a website or any other contact data is they are no longer in buisness. Some of the Mitchell line can be also found under "BROLIN" including the Mitchell Single Action revolvers That is the GOOD news,the bad is that Brolin is no longer in buisness either..but here are a pair of "maybe's" for you The U.S Arms SAA also rotate oposit of a Colt and are supposed to be a mirror image gun..so "Maybe" and this company has parts for many imports and Mitchell and Brolin were both importers....so... try www.vtigunparts.com
Charlie, While the company known as Mitchell Arms..the one that IMPORTED your version of the SAA went out of buisness, the priciples of that company are still in the gun buisness as Mitchell's Mausers ,www.mauser.org and someone there may be able to tell you who made the revolver or at least who they imported it from. Another clue will be the markings that are called proofmarks. If it is an import from Italy,Spain, Germany etc..then it will be proofed in that country and the marks stamped on the gun are unique to that country(the USA doesn't have a National Proofhouse) the thing that may circumnavigate this is if the parts were imported..partially finished, then the final machining,fitting and assembly done here...but if you can find those marks..then a maker may be found and with that a source of parts
Re-post here if you strike out.