You just need to get the screws out, don't need a plate, get an impact
driver, and hope the stripped screws come out, otherwise you might have
to drill the heads off to remove, or weld a bead onto the screw heads, depending
on what tools you have available to you.
If you drill them out you might need a new adjuster nut if the screws won't come
out of the old one, this is one spot where using the wrong tool can cause real
problems, the screws are really tight from the factory and strip easily if not removed
carefully with the right method
Wild