It probably just needs a rebuild to solve most of those problems. You can buy the foamies, but depending on the bolt, they may not work (like a PTP upgrade bolt won't work with them). Best to show us what it looks like. As far as the age, you can typically contact AGD to get that info, or the AGD owners group probably has someone in the know.
I'm really not good at writing signatures. I mean, what is it that you're really trying to do? Write something that somebody's actually going to remember, or even read? Yeah right! Nobody ever actually reads these things.