Rear level sensor

[guss]

Had the car ('98 S4 B5 saloon) on a ramp today and it looks like the level sensor bracket on the rear nearside has corroded to the point that the bottom end of the arm has disconnected from the small bracket which attaches to the rear wishbone. Done some searching and these parts look like they only come as a full sensor + arm + bracket. Can the small bracket be replaced on its own? + the arm? Or do I need to replace the whole lot (looking like £70 or so, which seems a lot considering what is actually broken).

TIA...