gm parts direct For a 64/65 part no is 394926 comes out to $76 +/- U.S. plus shipping. I don't know if the part number for a 68/72 is the same http://www.gmpartsdirect.com/ But they won't ship to me, so I purchased a 1 1/8" from Gasoline Alley $109.0 cdn plus $18.00 shipping Thanks Bruce
Bruce the sway bar from the factory is 7/8" thick and they wont let me pick one up even though I live less than 10 miles from them they charge different amounts for NC residents (sucks) BuickGSXJuiced I have a 1" rear swaybar for a NON boxed lower control arm buick I have all mounting hardware and it is like new..never been put on a car I bought it about a year ago and now dont need it so if you are interested in it I will sell it $85 + shiping here is a link to info on the swaybar Link to Swaybar Info Here is a picture of what it is <img src="http://i4.ebayimg.com/01/i/02/33/08/30_1.JPG">
I guess I should clarify, I have the UMI tubular control arms, I need the sway bar that has the 4-bolts that bolt to the rear lower control arms:TU: