I'm storing 2 LS's for a friend. He has 3 of them, and a Mirada. Your best bet for parts is getting a parts book, and searching the internet and Mopar sites for parts. Nobody is reproducing ANYTHING for these cars except for the rear taillight housings.

J bodies as well as late B's are not the most popular car right now, but dare to be different. You'll make friends and such from parts searching. On Mopar Style, there's a forum for them and F&M bodies as well.