The link you have followed to get to the Fand Music Press site is out of date.
Fand Music Press has established a new site which is completely different from its old one. As such, some links on other sites will inevitably be outdated. All the products that were previously listed on the old Fand site are still to be found on the new site, but because the way in which the new site works is fundamentally different, the individual page addresses had to change.
If you know what you were looking for, it should be quite easy to locate it by navigating around the site.
If you are responsible for the link that no longer works, do please update your link(s) as appropriate.
If you have any questions, or wish to report some other problem with the Fand site, please contact the Webmaster. Thank you.