Replacing Video sequence in existing Dynamic Link Session

Hello, 

I created a dynamic link between a sequence--I'll refer to this one as sequence A-- in Premiere Pro and Audition for a cut I thought was a final. Based on client feedback, I created a new sequence, sequence B, but wanted to keep the Audition session I had created for sequence A. Just avoid recreating the wheel with all of my existing audio edits. However, the video reference for sequence A is, of course, dynamicaly linked to the session created from sequence. How can I update the video reference (sequence A) to point at the new sequence B video?  Clear as mud? Sorry. I'll clarify anything that doesn't make sense. TIA!

David