Hmmmm. I've never seen a rubber grommet for latches on compartments.
Are you talking about the rubber seal around the edge of the compartment door? If not and you actually have rubber grommets around the latches, I'm not going to be much help. Might replace it with Butyl tape but many campers have nothing there, just contact between the latch/lock and the nut on the inside to tighten it.
A picture would help if that possible. You can use this link to upload and copy the link into a post.
http://photoposting.is-great.net/?i=3