These are the ones I have used-Pure Protein (Walmart, Costco), Click (The Vitamin Shoppe, Drink Click online) and Inspire (bariatriceating.com)
I would also go to Bariatric Foodie site. She has many recipes to improve the taste of your protein shakes plus a great book called "The Bariatric Foodie Guide to Perfect Protein Shakes". It is well worth the price. Without this book I am not sure I would have survived the protein shakes.
Best of luck. Hope this helps.