Swaybar is 33.3 mm where the bushing mounts. It is 34 mm on the ends. It is a hollow bar with solid ends just like the F-Body WS6/SS bars.

Energy bushings/greasable -9.5167-33 mm Advanced Auto online will price match. Cheapest is Energysuspension.com-15.99 for bushings and 8.99 for end link bushings and 15.99 for whole end link.
End links-2. options:
1. use just the bushing and use the GMPP end link hardware
Part# 9.8105
2. or use the entire Energy end link Part #-9.8122-this one I have not verified. After a search it was posted that this is what he used on his GMPP bar.