CAM COVER GASKET
 

While changing the coolant a couple of weeks ago i noticed that the n/s cam cover gasket is weeping oil.
I am going to do an oil change in a couple of weeks and thought that i may as well do this gasket then.
My question is what sealant do you guys use when replacing this gasket ??
and also any one done this job recently know how much the gasket costs?

Cheers