Try Don Hume 721 which you could just manipulate the leather at the bottom of the holster to accommodate a longer pistola.
Mine is for a 4516-1 open top no strap. Very comfortable. fits very close to the body. I never had owb before but loves this holster.
My only other previous holster was iwb Alien Gear.
https://www.donhume.com/index.php?ma...products_id=42