the one he recommends is called Protifar (and is easily available, I hear, in Belgium!!).
Let us know how you get on with it, if you use it in recipes replacing the oatbran. I don't think it's a straight switch, gramme for gramme, alas so you'll probably need a few tries to get it right!
I found this by googling:
soniacorsalini : Hi all, are we allowed to
use protein powder in our recipes? I found a protein powder similar to Protifar,
it contains: Whey protein and Soya lecithin. 100g of powder has 90 g protein; 1
g carbs; 0,5 g fat. 1 portion is 8 gr. Thank
you very much!!!
Moderatrice cathy : Hi again soniacorsalini and
thank you for the details of the ingredients! Well, you were completely right, I
previously said no to that protein and soy lecithin powder because I didn't know
the composition, but now you have given it, I would completely approve it, I am
sorry about my first answer.