Keep the fluid topped up until you can get the issue looked at.
You may have to bleed, if it has run dangerously low.
Should be a very simple job to detect the leak, probably hose, pipe or rad.
Alex.
Adjustable drop links are only sold in pairs.
Get them here:
http://www.clarkmotorsport.co.uk/parts/Anti-Roll-Bar---Link-Kit-Heavy-Duty-Adj-Steel-Ball/Front/KLC110
http://www.clarkmotorsport.co.uk/parts/Anti-Roll-Bar---Link-Kit-Heavy-Duty-Adj-Steel-Ball/Rear/KLC141
The mounting points are both similar.
The expensive parts is the headlamp washer stuff as the pre facelift washers will not fit the facelift.
The front/front arch liners are different but you can "make" them fit.
Also a pre facelift splitter will not fit a facelift.
If you tell DW what car you are fitting them to, they will advise.
However best to get wheels with acceptable ET so that you do not have to fit spacers.