I've digitised the Ping Pong Jerry tape and plan to put it on my Blogspot with lots of other old Sheffield band demoes and the back catalogue of my Premonition Tapes label (including interviews with Jarvis and Russell from circa 1986/87).
http://premonitiontapes.blogspot.com/
I also have some old live recordings of Pulp gigs circa 1984 - 1987 which I'll post as well unless there's any objections from the band.
Also going on Ebay soon is a copy of "Beware the Bacon Slicer" a compilation tape Mark Webber did in 1986, has 2 Pulp tracks on it.