hi, interior plastic for eagles is basically "unobtanium",carpets are no problem, and headliner material is generic. Window/door seals are also, generically easy to get. There are a couple of things you can do to repair interior plastic. My rear side widow surrounds fell into 8-10 pieces when I removed them. Using a plastic weld kit, lots of patience, and helping hands from a friend, I got them back together, and VERY CAREFULLY, reinstalled them. Check out a video on youtube about welding plastic using wire ties and a soldering iron. Works! But, very tricky.
good luck! gz