Another note on Phil Carson - He did serve as creator and exec producer for 2001's Good Rockin' Tonight: The Legacy of Sun Records disc, which featured Page/Plant and was released on Atlantic. However, at that point, a story from the Boston Globe also says that Carson was still an executive for JVC's Victory Records.
http://www.biwa.ne.jp/~presley/elnews177.htm
(scroll down to the story "Sun tribute CD makes legendary founder beam" by Steve Morse, Oct. 27, 2001)
And a quick bio from Chris Welch's 2003 book "Closer to the Edge: The Story of Yes"