Eiko 50/15W bulbs on Amazon: [ame="http://www.amazon.com/Eiko-Light-Bulbs-Halogen-H1157-BP/dp/B0022ZTJLW/ref=sr_1_3?ie=UTF8&qid=1356107935&sr=8-3&keywords=eiko%201157%20bulb&tag=viglink22922-20"]Amazon.com: Eiko H1157-BP Halogen Lamp (Pack of 1): Automotive@@AMEPARAM@@http://ecx.images-amazon.com/images/I/31wRjhARIkL.@@AMEPARAM@@31wRjhARIkL[/ame]
The original thread on the bulbs:
Bright bulbs for rectangular tail lights