Too high protein is hard to find on your typical chicken aisle. The studies which tried to induce health defects in chicken from excess protein were in excess of 30%cp. You aren't going to find that on the typical shelf, and you won't find it priced comparably to an All Flock.
There are some...
Mixed mutt, free range flock - all ages, both genders. All Flock-type formulation is the only practical approach for most. Which is why I recommend.
For complicated reasons, I don't actually feed my own birds this way, but I don't feed them Layer, either. As I said in the linked comment...