You can use almond butter, or any other nut butter of choice, in place of peanut butter.
If you prefer a more cookie-dough-like texture you can replace the oats with Kodiak Cakes flour.
If you're using all-natural peanut butter, you may need to add a little more honey or some melted coconut oil to help bind the protein balls together better (if the mixture seems dry and crumbly).