Where to find interior trim panels?

I recently purchased an 81 hatchback that had sat out in the sun just long enough fr the interior plastic trim to dry and crack so much its mostly dust now. I'd like to replace it with new or used black pieces. I need door panels, quarter interior trim, and the trunk stuff.

Two questions:
1. What year pieces will work in this car? It is an '81 hatchback.

2. Does anyone sell what I need new?

Here is a picture that kind of shows what I am talking about:
View attachment 217363

Fred