Welcome to the Zone > . With the side panel; and rear seat belts, you could use ones from any FSB from 80 - 96. Your best bet is to look around at local friendly Auto Recyclers. You will need a large Torx bit, I believe it is around a T55 or T60 to get the rear seat belts out, the side panels should only require a Philips bit and the removal of the trim pieces around it.
Good luck,

/emoticons/
[email protected] 2x" width="20" height="20" />