I am one week in to a two-week all Protein shake diet, it sucks doesn't it?
I found Myoplex Lite by EAS and Muscle Milk Lite. They both have a lot more protein than the Slim Fast or Carnation Instant Breakfast that my surgeon reccomends. They are pricy in comparison, but the way I see it, the costs of either of these two products are still cheaper than the "value" meals that got me into this mess.
You can get these at GNC, which is probably in every mall, everywhere. They also sell a bottle shaker with steel coil ball inside of it. It was about $8, but it really breaks up he powder well, a lot less of those little powder pockets at the top of the shake.
Hope this helps. Good luck.