They were released as mag scans I believe around the time M was released.

http://gwareth.org/gallery/Ayumi1/Ay...GirlPop/mag18/
She's wearing the same outfit as the 'M' cover, and I believe they were like 'offshots'
http://ahsforum.com/forum/showthread.php?t=88004
more pics~

Also, it was featured in the A COMPLETE booklet as an offshot cover.
http://gwareth.org/gallery/Ayumi1/CD...012-1.jpg.html