They are the universal ones for a 4 door, I adjusted length as I needed for mine to replace damage- which is a 2 door. 2 and 4 door have same wheelbase and panel section goes wheel well to ww. These units dont have sills on them so they work perfect for rust repair, cut them to length and notch as required. I see your in London, just go to an auto parts store (even partsource-last resort) and order universal rocker panel replacement just like in the picture in link above- they order from Keystone/Cross-Canada. I get discount and they were $30, ask for a cash account discount- tell them you will be back to order lots of parts as you have a Grand Prix and they should offer you garage pricing.
I glued (auto panel adhesive) and pop riveted mine on using 3/16 rivets ( have an air riveter from Princess Auto). I also have a mig welder and this is a faster and structurally sound repair. http://www.levineautoparts.com/maxim814.html
Keystone http://ecat.crosscanadaparts.com/bas...p?go=exprorder
