Where to post for a spot in Callaway House?

Hey guys,

I'm going to UTSA next year as a CAP student; however, I already had a reservation at Callaway since the fall semester of last year since I heard the wait list was pretty long for Callaway. Would anyone know where I would go to post an ad for a vacancy at Callaway since I need to find someone to take over my contract for next year?

Thanks!