I just Googled "Sanborn Gil Evans" and then filtered for videos. This was in there.
As for more, probably so. The poster says that they got it from " a website that no longer exists", which no doubt means a blog. The odds of there being just that one track being recorded strike me as being quite remote.
Ok then, that's the same as the Bluebird CD, only it adds the two short jam excerpts that end each side of the LP.
It's radically different enough that it would not be wrong to issue a double set, one of the LP + one of the revised Bluebird album.
Worth noting that Gil never went back to a bebop altoist after Sanborn.
Chris Hunter was in there to the end and whatever his did with anybody else, with Gil he played what could probably called The Sanborn Chair.