Thanks guy. It took me a long time before I found that play. I came to realize that the two LAGs behind me would have raised me if they had anything good, so if I reraised the bad LAG, they'd likely be forced to fold and I could get HU with the bad LAG.
I made it $20 to go (which I think looks stronger than a push - and lets me preserve my stack in case one of the LAGs decides to go crazy) and got my isolation. I even won the hand.