MM1-5: http://telp.org/files/mm1-5/ (Compare files to game names)
MM6: http://telp.org/files/mm6/ (Depending on your game version, you'd want the mm610-12.exe or mm611-12.exe)
MM7: http://www.angelfire.com/id/mmvii/files.html
MM8: No patch exists
MM9: http://telp.org/mm9/patches/patches.html or directly at http://telp.org/mm9/patches/ptch13dnld.html#item1

You would also like to install Mok's patches for MM6-8.
Read the threads and click the link:

http://telp.org/mm6/tavern/anyboard/posts/27430.html
http://telp.org/mm7/tavern/anyboard/posts/19648.html
http://telp.org/mm8/tavern/anyboard/posts/13974.html