If you think your sway bar is hitting the rear lateral link, then pull one of the rear tires and check the area where you suspect it hits...There should be a dent or rubbing mark on your lateral link (kinda like metal to metal friction, there should be a shinny dent on your lateral link, under the sway bar). Now, if it is rubbing, you can:
A. find a new shorter/adjustable end link.
B. Raise your car up...Might be way too low.
C. Remove the rear sway bar.
Just a reminder...the end link is attached to the struts, so when your ride goes up or down, the sway bar follows...If your sway bar hits that link, you're damaging your whole suspension (struts, lateral links, sway bar...)
Also, did you shorten/remove your bump stops? If your car is that low, you will be replacing those struts often.
WiL