Hey, great to hear from a longtime player! Just checked my Mediafire account and I've got the following original maps:
7th Street: http://www.mediafire.com/file/u6brh0yi4wb4krb/7thStreetV11.zip/file
Claustrophobia: http://www.mediafire.com/file/zw7fbkf9t5609ii/ClaustrophobiaV11.zip/file
Elementary: http://www.mediafire.com/file/r6a883ulvt898yr/ElementaryV110.zip/file
Not sure about the others but they're bound to be available online somewhere with a bit of digging.