Technically, removal of the grips and pulling the right side safety out is how the safety was designed to come apart for disassembly. One of my para's had a similar problem.
Once the weapon is field stripped, take the grips off. Remove the right side safety lever by pulling it out. Cock the hammer and engage the left safety. Push the left safety up just past it's normal range and wiggle it out (sometimes, if it's really stuck, you can push a pin punch from the opposite side of the frame while wiggling the safety free). once the safety is out look at the rod-like section of the left and right pieces. they have a tongue and groove type interface. put the two pieces together and see if there is a sizable amount of play in the groove. if there is too much you may want to reassemble the gun and send it back for warranty repair. if the amount of free space is barely noticable you can GENTLY tap the two prong section of the safety with a hammer to tighten the groove and make the interface between the two parts stronger(i.e. more difficult to separate). don't go too far or the two parts will not go together at all. take your time and be patient. if you bend too much, hit too hard, or try to correct an over tightening you will substantially increase the chance the part will break and put you in a bad spot.
if this sounds like too much of a chance or you're not a tinkerer at heart, or you're not particularly experienced with the joy of fixing (usually breaking, replacing, breaking again, cursing, etc.) your own stuff i would reccommend you send it to the factory or a gunsmith for the repair.
i'm also not saying this is the only solution but it's the one that worked for me. there are plenty of members here with different ways of fixing different problems. hopefully you'll get two or three solutions from them to choose from.
good luck