There is not a mailing address for Julian. You can contact Jules through his Official website www.julianlennon.com
Jules Rules is run by CJ Burianek and Laura Dever. To become a member of Jules Rules write to:
Jules Rules, PO Box 600 704, Dallas, Texas, 733-0704, USA
There are quite a few good biographies on the net. One of the best is at Hey Jules, a brilliant website by my good friend CJ.
As with the biography, Hey Jules contains a very comprehensive discography. I've rounded up some of the main records that Julian has produced for you here:
Atlantic Records 7-80184 1984 Charisma Records, Ltd.
Atlantic Records 7 81640-4-E 1986 Charisma Records, Ltd.
781928-2 1989 Atlantic Records Corperation
1991 Atlantic Records Corpeation HY 82280-2
Music From Another Room MF AR44CD 1998 4tune Music Lid.