From your description it sounds like you want a SOB (small of the back) holster.
I had a Galco SOB for my S&W 469 before I got rid of it. Galco may have made them for your model at some time, but it's not listed on their sight right now. You might luck out and find something on ebay or you could post a WTB on the S&W forum and see if you find someone with one.
A forum community dedicated to defensive firearm owners and enthusiasts. Come join the discussion about everyday carry, optics, holsters, gunsmithing, styles, reviews, accessories, classifieds, and more!