1. The bearings may have gone, best to take them out and look as either side could be ruined if your running a hs33 the pads do wobble on the pistons any way.
2. your best option is helecoiling the brake, but maybe just drill the hole as if you would be helicoiling and put a lobger bolt through and put a nut on the end this way you can still heli coil it to the same size at a later date.
Adam