I think that the only factory extended safety you can use on the SP01, 75b, and 75 compact would be the factory shadow safetey. The shadow 2 safety will only work on the tactical sport, shadow 2, shadow compact,the steel frame sp01 compact, and steel frame p01 models. They have a slightly thicker frame than the regular 75 pistols. Maybe the S2 safety could be modified to work but probably not easy. CZ Custom shop sells their own design extended safety for the 75 and SP01 models which has a real wide shelf on it (wider than the shadow 2 safety) which could be something you could use.