For most of my life I put up with a faulty Buhler style scope relief safety on my sporterized Springfield 03A3. Jiggle the bolt and safety disengaged. My old habit was constantly checking the safety while hunting to ensure it hadn't slipped off. That was sorta acceptable because I hunted alone. But when I started hunting Africa with PH and tracker that safety had to go. Installed a better scope relief safety at the same I put iron sights and quick detach rings on the rifle. Unfortunately, the new safety is also unsafe when the scope is removed. Then it's unprotected by scope, easily caught on clothing, and disengaged. So I'll probably spend the big bucks for 3-position Model 70 side safety. About twice the price of similar safety I installed on my military Mauser 404J. You can buy one of those for $200 that will fit your rifle. Or a "deluxe" Timney trigger with trigger block safety, but that would require modifying the stock. I would suggest considering upgrade to standard Timney trigger and 3-position Model 70 style safety. Those safeties sometimes require modifying the striker or trigger. Don't mess up either original equipment. Modify the sear on aftermarket Timney if needed. Save the old parts in case some day you decide to restore the rifle (as much as possible) to original. But that would require filling the scope base screw holes, polish, and have it reblued. Since it never will be original and because that caliber is best served with a scope (i.e. not a dangerous game rifle), I would probably upgrade to a different safety.
Have you been able to locate any ammo for it? There must be an interesting story behind this rifle and its extended residence at a local African police station. The fact that I didn't get legs and walk out the back door years ago must say something about the integrity of that unit.