I bought a Gould & Goodrich holster from J&G Sales on Ebay. The 696 fits in it very nicely.
This is what their current listing says for it…
“This auction is for a right handed Gould & Goodrich 2-slot black pancake holster for a S&W K-frame revolver with a 3" barrel or similar. Used, with some worn spots and small leather cracking, this holster has "B29 33" stamped on the back, is equipped with a thumb-break retaining strap. The bottom is open making it possible for longer barrels to fit. The picture is generally representative of the holster you will receive.”
Joe