I sell the Matt Hotch one that is very nice, very good quality. One of my employees put one in his S10 and the emissions guy passed him fine.(here in AZ) This one comes with a weld in bung that has a lip on it so it welds in flush. It is a high quality cap and mount so its more than $65
http://grunionfabrication.com/matt-hotch-designs-pop-gas-cap-p-573.html