Could be from the 95 NME article, "Never Gonna Give up / Never Gonna Stop".
Not on this list: There's a few between-songs "Jams" from the early-ish days that don't have names, instrumental, but act as segues, like into Failure. There's about 2 or 3 unique ones on different bootlegs.
Plus what's that drum thing from the 2011 acoustic gigs? I since worked out the riff is "shave and a haircut, two bits
", could be a "cover", could be Lee unaware of what it is.
Not strictly helpful, but I did see some internal notes from the label once, and working titles were on it, EG. "Big Black Car" for "I Can't Sleep".