I got a copy of The Wizard's Tower from Cool Stuff Inc a few weeks ago. Have you checked http://www.boardgameprices.com ? Looks like Thought Hammer has it on "pre-order" expecting it in stock during Oct 2012. Cool Stuf doesn't have in stock at this time.
Just a quick update. Both Castle Panic and The Wizard's Tower are now back in stock in our warehouse. It can take a few days to a week or so to get the stock back onto the shelves of your local store, but the games are out there now!
If you're local game store doesn't have it, tell them to order it!