I'm surprised you can't find a reasonable copy -- there are some relatively cheap editions out there and still in print. I recommend the Penguin Classics edition (here's an Amazon.co.uk link to it and here's an Amazon canada link) and the Daedaulus Press 'Tales From the Saragossa Manuscript -- Ten Days in the Life of Alphonse Van Worden' is in print as well, (Amazon.co.uk link here). The latter contains a fascinating foreword by Brian Stableford explaining why some people believe that only the first ten days of the Manuscript are genuine, and the rest of it a mysterious forgery, and is worth reading even if you wind up disagreeing with his conclusions.