There are several artist going by this name:
These are photos from concerts where Plan 9 played, so they may be of other bands that played the concert as well.
Plan 9 / Lonely Kings / Psychosomatic / Massacre Time Mar 24, 2007 Sacramento, California, United States Uploaded by Sacramento Shows
The Hags / Plan 9 / Freshly Wrapped Candies Apr 13, 1986 Huntington Beach, California, United States Uploaded by Gfuhrer