Hi,
Trying to put new brakes on and the rear caliper anchor bracket sliding pins are ceased and won't budge. Is there anyone near us (Berkshire, Ascot - Reading - Bracknell...) or close enough for us to drive to who would have some spare ones? Please?

Pretty please?
Or anyone know how to uncease them easily?
Or are they common to any other sierras, hence we could go to a breaker's yard and pinch one?
Thanks !!