I will point out that we're a colony and haven't done an actual rush without an ARM being here yet, but here's some shirt's we've designed, with one being a shirt from someone who transferred in...
(shirt we did for a blackout game)
(we actually just went with just the outline, no black)
(Breast Cancer shirt)
(Intramural jersey shirt)
(designed, not made)
(brother who transferred in)
(rush poster idea)
(designed, not made)
(designed, not made)
...hope that helps give you some ideas.