Found it!
Cool Beans! Magazine #8 Traveling Issue Bonus CD
released in 98.
one of the tracks is a 5-minute untitled piece of improvisation by Lee Ranaldo w/ Master Musicians of Jajouka. there are plans to release an entire album of this stuff, i'll definitely get it. the issue of Cool Beans! that this accompanies has some of LR's Moroccan journal.
Now I just need to find a copy.