I don't know if this would contain PB or not, but a friend of mine had to put their cat in a canvas laundry bag with a drawstring to put meds in its ears. This was a 'freak out' kitty too! She still put up a helluva fight but they were able to get in and get it done slightly quicker before she went completely berserk. They did the towel wrap and then slid the bag up around the towel. It was tricky but it helped.

Good luck with PB and your booboos.