BW welcome to FTF,
The 669 is the same as the 569, the diference being the 669 is stainless steel. This might open your search up at bit. It is an older pistol but a nice one, that if in good condition will serve you well. Highnoon makes a holster for almost any pistol but a bit expensive. Check ebay for S&W 569 and 669, you might find something there. Or just google S&W 569 and S&W 669 holsters.