The hole in the frame is larger in diameter to accommodate the right side safety. Someone (skilled at welding up/redrilling the hole should be able to do it (redrilling it to the correct diameter for the end of the single side safety shaft) but is it worth it?
On the other hand, you could buy a standard CZ 75 (that comes with the left side safety only) and convert it to SAO. There are several people here that have converted their CZ 75 pistols to SAO. The parts are available from CGW (Cajun Gun Works) for sure and probably from CZ Custom as well.