Ok, its this weekend...time to tune up a few things. Is there a specific lubricant or other 'stuff' one can put on rubber grommets to slow cracking or deterioration of these suspensions parts...WD40?, 303, bacon fat?

 

There is nothing that can slow down or defer the deterioration of rubber. Eventually it simply rots away and loses its shape and then you feel the sloppiness in driving. Although over time you don't really notice it...its when the rubber parts are replaced...Yikes! I can't believe how my car feels like new!
If you get a parts list and price sheet for replacement I'm sure this list would like to view it. I have wondered how much would it cost. I have no idea.
Sorry, no magic foofoo juice to make it better.