Head north on I-Drive towards the Premium Outlet (Belz). Once you start to leave the Hotels behind, there is a superb Golf Discount Outlet store on the right hand side. It is pretty hard to miss and is located next to a Discount Shoe Oultet.
I found the staff in there have all the time in the world for the customer. One guy in particular was an ex-pat from Kent, so chatted for ages. He did a really good deal for me on a driver and a couple of wedges. Also waited until the boss had left and gave us 2 dozen balls for free.
Always ask if they can throw in any extras, they invariably will.