The long, curved timing chain rail in your middle picture is an expensive part.
($40-ish from memory).
The nylon lining portion is available separately(from M-B).
It is the wear component. We replace just the lining "shoe", and re-use the aluminum base.

Saves about $35. Just a drop in the bucket, but you've got a pretty big bucket already.

Other than that, a normal parts list--
Every head gasket set I've ever bought had intake gaskets-
if you are buying sets, no need for intake gaskets.
At 187k, you might consider the rubber boots between the upper and lower intake manifold halves.
Only other suggestion would be trans ft pump seal and o-ring, while you're in there.

Enjoy.

__________________
Todd Haven
Parts Manager
MPH Automotive
Houston,TX