Ever heard of Dark Horse Studios? They are a comic company, they print Hellboy for example. Their logo might be exactly what you could use. Make transfers outta them. Might be a solution. http://www.darkhorse.com/ Logo is all over the page. Just use photo shop to change the color and add a point.
Love the models and their colors. I have a multitude of beakies and RT guys myself. They are my vet sargents and vet squads. I am green with envy ya have that Chaplain. And the old Dreads The few figures I could not source back then......Although I have the old speeder :P
Maybe they are a chapter on crusade to right a wrong perceived they had done. The Marines with No Name ;)