I too have been searching for an Atkins friendly protein shake. I didn't get any responses on my post either. so I decided to just try my luck at coming up with something and see how it goes. I bought Whey Isolate Vanilla Creme flavored. 1 scoop is 130 calories, .05 fat, 1 G carb & 30 g protein. I mix with 1 cup unsweetened Silk Almond Milk vanilla flavor which is 30 calories, 2.5 g fat, 1 g carb and 1 g protein. added 1oz cream cheese for 70 calories, 6 g fat, 2 g carbs and 2 g protein. mix in blender with 4-6 ice cubes.
Totals
230 calories
Fat 10 g
Carb 4 g
Protein 33 g

I don't know much about protein shakes. I just know that my mid week workout suffers as I struggle to finish the same amount of reps I did on Monday so just started this last night as POW. Protein shake. I am hoping the isolate doesn't bump me out of ketosis. I plan to give it a week and if I seem stable on my weight loss I will bump up to 2 scoops. If I stall I will be looking again for a different option.