Hi,
I checked the first one ie r/h upper #30779318 and although it is dry as a bone it does look like it has virtually collapsed.
The second item is the lower left #31316875 I assumed had collapsed and intend to replace that as well as the r/h lower #31277313 as it has been bathed in oil courtesy r/c gasket.
Ah well, I guess that is dealer service for you.
Shame the sales department has the purse strings. Feed 'em peanuts ................ ouch!
Thanks again for your help.