MG ZS rear anti roll bar replacement?

What are the options for replacing the rear anti roll bar in a ZS TD? On Rimmerbros there are three types; 16mm, 18mm and 20mm. Going by their information it looks like only the 20mm is MG compatible and as it happens its NLA.



So, is it possible to convert the car from 20mm to 18mm? Second hand 20mm off of ebay? Other options?

from the last news http://ift.tt/1BeqGw6

via IFTTT