Lower Control Arm Fail?

I thoguht it may be the engine mounts, so I replaced the side and front mounts (both of which were destroyed).. Took it for a drive -- Sound still just as loud :(

So I went around trying to isolate it by spraying white lithium grease on rubber components

and I think Ive isolated it to the front passenger LCA

So while I'm getting ready to spray some grease on it to make sure it was the source, I notice that the arm is really close to making metal contact with the mount:
PASSENGER SIDE:
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So I look at the driver side and .. its no where near as low:
DRIVER SIDE:
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Sooo I'm guessing its failed...

I think this may have been my fault as well, I used the LCA to lock a breaker bar in place to remove my Crankshaft Pulley when replacing the Timing Belt which may have knocked it loose somehow.
That could be why this wasn't an issue before I did my 105k service.


So question now is, how hard is this to repair?
I've seen the big LCA repair thread but there doesn't seem to be a definitive DIY.

Should I just take it to a shop?