This thread is about 7 years old, and I have been on here since at least a couple years before that, but I have never noticed or seen anything on this site fitting the description of "Search Tabs By Setlist". Apparently "davwhatmore" had no trouble finding it, unless he is some kind of spambot and this feature is actually long gone.
"There, in huge black letters, was 'The Grateful Dead'. It just... cancelled my mind out."-Garcia