Digital formats (FLAC/MP3) are likely available through allflac.com which lists the 2003 release. Important Notes:
The 2003 album Millbrook U.S.A. by Golden Earring can be found on several, mostly older, music sharing platforms. Download Golden Earring Millbrook 2003 rar
The album is listed on boxalbums.com as available for download. Download Golden Earring Millbrook 2003 rar
These are third-party, older links, so file availability or safety is not guaranteed. Download Golden Earring Millbrook 2003 rar
Millbrook U.S.A. is sometimes listed with a 2004 date on some platforms.
A 2012 post on metallurg74.livejournal.com features a download link to a RAR file for the album.