If I was you I'd try to find out where the away fans are boozing after they get off the coaches/trains from Liverpool and head to those pubs asap sunday 11am. You may get lucky and find someone hasn't travelled and their mate has the ticket going spare. Buy the fella a few drinks if you do get a spare though. Not sure how thriving the wba touting scene is, some brummie just might sell you an overpriced ticket in the home end - be aware of fakes!!