Jimmy Page is a fan.
He briefly acknowledges this piece when they are discussing guitar strings in It Might Get Loud. He mentions putting a banjo string in the guitar. That’s what Travis did in the studio when he had a broken string.
Just to give a clue as to how big a Travis Wammack fan Mr. Page and Mr. Plant were, they went backstage at a Little Richard concert in the 1970s not to meet Mr. Penniman or any of the other musicians. They went to see the guy who played “Scratchy” who was serving as Little Richard’s band leader in that era.
There are several parts to this series of interviews. I think this is the one where he mentions the guys from Led Zeppelin.
http://www.youtube.com/watch?v=CMWqXCdJ_Q8