I just did the cruiser coils/BJ spacer lift on my 4runner and the rear swaybar limks look like they have a lot of tension on them. I searched and could not really find any. Where can I buy some extended ones?

 

Sorry I dont know where to get extensions but if you wheel and want flex i would just throw the sway bars away. You will get a little added body roll but flex too.

 

I wouldn't really worry about the rear sway bar endlinks with only an inch or two more length to deal with. switch everything out to urethane bushings and the problem is all but gone.
but if you really do think they're too short, find a threaded coupler the same thread size and pitch as the threaded end (next to the swaybar), and some studs (or threaded rod) that you can thread in to the coupling and make your own extensions.