Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Why would the boots need protection? They move with the a arms and do not change position.? I have never seen anything that could be added other than skid plates under the unit to keep rooks and debris from flying up into the boot area.
So you need plates to fit the new arms! Sorry. I can't help. Likely you will have to custom make them. But I will opt out and see if someone else has a source for the plates.