The svt uses a 21mm front and rear sway bar. If you are doing the rear, might as well replace the endlinks with polly bushings as well.
Prothane also makes good polly bushings, can find them here for the front and the rear:
Energy front/rear sway bar bushings can be found on summit racings site as well, just make sure they are 21mm. Should be able to find them else where on the net, should have the same part numbers