Well sometimes CDs and vinyls (and books for that matters) are simply not available anymore, because they were all sold, and because no reprint was done lately..

Maybe the one you are looking for is not all sold and is reprinted, but maybe this info is useful coz it might be the case

The same happened to me a few years ago, and it was that the record was simply not printed anymore by the label people.

Good luck with the one you are looking for though