Must be in good usuable condition,im after 1 or a couple of the front bumper fixings that you put in through the wheelarch that goes into the bumper then twist to fasten it. Think there the same for the rear aswell.
These are for my 3 door cosworth,but base sierra's had them aswell i think?!

Cheers

 

I got mine from ebay:-

http://cgi.ebay.co.uk/Ford-Sierra-RS...1%7C240%3A1318

He will sell individual parts to you if you dont want the whole lot. I got the pins on thier own.