If you google "holster for S&W model 41" you will get a couple of hits including DeSantis, Triple K, etc. I am fond of the Safepacker line of "holsters" as you can fasten them to a hip belt and they don't look like holsters, and they might be a bit more kind to the finish and sights on a nice gun like the Model 41.
https://www.thewilderness.com/safepacker-concealment-holster/#safepacker-bottomWhile I admit to carrying a J-frame S&W concealed when I bird hunt for other two-legged threats pretty much you have everything you need for snakes or porkys with the shotgun you are already carrying. Now, hiking or dog training in the off-season, that's another story.
Bruce