Why don't these exist yet? The phrase must be officially sanctioned by the athletic department, since they played the portion of that press conference in the stadium to big cheers. Adidias logo or not, I'd wear one.
"The University of Illinois is also in turmoil. The university sports an Interim Chancellor, an Interim Athletic Director, and an Interim Football Coach; the game will be played at Soldier Field, making this an Illini Interim Home Game."