You are right about the Sure P.A. system, it was inovative in the early 70's (and expensive) £2500-00 then... and yes they did get it nicked along with Joe Murphy's 1967 hand signed gold plated Les Paul custom sunburst guitar (worth about $200,000-00 according to ebay.com) . Skip Holroyd has his own music shop in Darwen called CUE MUSIC and Joe Murphy (JOEL DAVID) is still performing take a look at;
joeldavid on Myspace Music - Free Streaming MP3s, Pictures & Music Downloads .Jack.O