Front swaybar drop link rod missing

I don’t know when this occurred but one of these drop links has fallen off my AW11 front sway bar.  I discovered this on a friends hoist when trying to find a bad clunking noise when driving over pot holes.
It's possible it may have been missing before I bought the car as I have not noticed any change in how the car handles.
 
I also don’t know how the car will handle after I replace this missing link as with only one link attached the sway bar is not doing anything to the front suspension at all.
I should add the vehicle is also fitted with D2 coil overs so these maybe making up for the front sway bar being out of action.
 
Having not seen a AW11 drop link before I am thinking that these ones are modified to allow for different lengths.  Is this normal on a stock AW11?
The current length of this rod between centres is  18.5 cm.
 
Question:  Am I going to gain better handling if I replace this drop link.  The suspension is very hard at present and to me the car handles well.
 
Does any one have such a link rod they would like to sell?

Yes the suspension is stiff and very hard to compress to the point where if I am outside pushing down on a front guard with both hands there appears to be no give and I worry I might bend a guard.
The ride for me is not hard, feels very nice on the road. My only complaint is this loud clunking noise I hear over small pot holes.  Noise seems to be RH side some where near me feet.  Maybe the pillow ball on top of the RH strut. 
I have had a look around the camber top but don't see any sign that anything is moving.
 
Only other thing that I can add is if I jack up under the RH side of the front cross member until the RH wheel is off the ground the LH wheel soon follows it.  I imagine this is intentional as the car was set up for circuit racing (RobYob's old door stop)
 
 

That's a good question and one that I will look into.  Thanks.
 
Do you know what the measurement center to center is on a standard front sway bar drop link?

Thanks again Dennis.
 
This link kit looks good.  Will cater for many lengths.
http://www.ebay.com/itm/ADJUSTABLE-SWAY-BAR-LINKS-FOR-AUDI-A3-8P-2003-2013-FWD-/281167566809
 
Will buy this unless anyone has a seen some thing better.
Could buy more units for anyone interested to bring shipping cost down.