[200q20v] Coolant leak

[Mpl20020vtq at aol.com]

  I have developed a small coolant leak.  Its just a small drip.   It is on 
the back of the engine on the passenger side. I thought it was cooming from 
the hose that goes from the block to the Vacum Servo(at least I think thats 
what it is from the Bentley manual).  I replaced this hose because I thought 
it had a small split.  Then I noticed it might be coming from the hinge on 
that servo mechanism.  Has anyone else had this item leak?  Any idea of the 
price? Is this is a dealer only item?  Thanks in advance.

Michael
91 200q20v  102k