Subaruparts.com has them. They would have new pannels, but you could go to carparts.com to find a used one.
The side piece is called a garnish - pick from the list.
http://www.subaruparts.com/diag/?mod...ear=1992&scn=9
The owners manual is located here.
http://www.subaruparts.com/catalog/?section=207
One of the web sites for used parts is here.
http://www.carparts.com
Good luck.