Sketch86 has Karma Incorporated t-shirts available (click here). Tom Kurzanski designed these shirts a few years ago, and I didn't know there were any left. Small, large, and 2x-large are the only sizes remaining.
Sketch86's other comic book shirts include Daisy Kutter, Dead@17, Random Encounter, The Lost Books of Eve, and You'll Have That.
Show some indie love, buy a t-shirt.