<blockquote>“Dear Prudence,” a track the band played often in their early days of touring.</blockquote>
Even though reporting was spotty and far from complete .. it seems as though a Beatles song that was played "often" would have gotten a mention on the old fan boards.
I'm pretty sure all of the setlists posted by fans made it to Setlist.fm when the new GPN Forum replaced those old sites . . and archive.org (LMA) was also scoured and listed.
The Beatles' "Come Together" shows up 18 times from 12/31/06 to 11/30/07 . . but no Prudence. 

So ?? . . . where's Tedheadone ?