You want to carry a $800.00 gun in a $30.00 holster. OK.
Uncle Mike's makes Nylon-fabric OWB holsters with safety straps.
Maybe one of them would do.
To a great extent, gun-carry safety depends upon the holster. It should cover the trigger completely, and, in the case of a SA semi-auto, it should also immobilize the safety lever.
It should also allow quick, secure access to the pistol.
Generally speaking, Nylon-fabric holsters don't do any of these things well. Molded Kydex does a couple of them pretty well, depending upon the design.
A high-quality leather holster can do it all, if properly designed.