Hmm, I followed your Abebooks link above, and I'm not sure the "Unleashed" thing is what I'm looking for. It's a 160-page "trade paperback", and it was published in 2000, not 1997. Is 'Bukowski on Bukowski' more like a xeroxed fanzine, or is it an actual paperback book?
I was in a record shop in London in 1997. At the check-out counter I saw some loosely-plastic-wrapped copies of what looked to me like fanzines having to do with CB. As I recall, it was American in origin, not British. I got one (and I wish I knew where I put it!). There was another issue of...
The first Bukowski work I ever encountered was the vinyl record, "Bukowski Reads His Poetry" on Takoma, when the radio station I spin for got a promo copy. Live performance, grade-b sound quality as I recall, but my mind was blown nonetheless!