At the time I couldn't find a set of 5on5 spider caps so I had to make my own. I added some chrome bullets to the factory truck rally caps and got the look I wanted, I recently found bullet lugnuts to complete the look.
http://www.impalassforum.com/vBulletin/showthread.php?t=183204 Here is a link for more info on the caps. It was simple to do and the bullets were $9.99 each, the caps were free from my Dad who had a couple of sets sitting around. They were simple to put together, the center caps already have holes in them and the bullets are the same diameter. I recently found these to round out the look of spider caps. http://www.hotrodhanks.com/products/accessories/sfID1/5/sfID2/6/productID_/4036/manufacturerID/156