Sounds more like a motor mount. If a strut or shock were that far gone, you would be able to get at least a little rebound. Since you get this sound when you shut the engine down, I have to assume that the car is not moving, so, to me it would be unlikely that a strut or shock is producing the clunk. But, hey..who knows. I would look elsewhere. Get some one to shut the engine off while you stand on that side with the hood open. You may be able to get a better fix on the noise that way.

__________________
Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.