http://www.mcmaster....steners/=7hsjcd
Page 3255 (for some reason the link keeps coming up to page 3253). I don't remember the length off the top of my head that I got though. It was several years ago. You also need the clip-on nuts under them. They come with retainers, but I got some thin plastic washers too so they don't scratch up the paint. I'm sure those are on the site somewhere too, although I might have got those at Lowe's.
All said and done, I think it was less than $20. I did the 3 on each side, 2 on the bottom that connects both sides together, and the 4 on top that connects the dash to the sides (1 of those is a real pain though - too thick of plastic build up). So maybe I spent more than $20 since that comes up to 12 and the packages come in 10's. I have extras though now.