I have a spare rear arm available if anyone is interested. It looks like an off side one to me.
It was an ABS one, but i cut the ABS sensor holder out to recover the sensor (see picture)
Mostly suitable for a NON ABS car (unless you drill and tap the arm and make a bracket to hold it?)
The outer bearing on the pivot has been run dry at some point, so the race is a bit eaten into however the current bearing is well seated without problems.
Good as a spare, or to speed up the replacement job.
£30 OVNO from Coventry, J2M6 (collection only, no postage).