I checked and replaced my bolt stop, firing pin, firing pin spring, recoil spring and hammer spring. The bolt stop and firing pin were both in vg condition, I replaced them because they're original, and matching.
You should replace the springs, and carefully examine the back of the barrel extension to be sure there's no peening, cracking, or deformation behind the bolt stop slot.
I'm not sure where you can find boxes of Fiocchi ammo. I managed to locate 2 boxes from a private seller. I'm reloading for my mauser now.
You could try pulling the bullets from some TT ammo, and replacing the powder with a softer load of HP38 or similar.