I have a 2006 A3 and the left rear outside lights are not working. When I checked bulbs I discovered a significant amount of rust on the bulb holder board and the electrical connector is rusted, corroded, and partially melted. My questions are; Where can I purchase a pigtail electrical connector and what are the correct bulb numbers. I have purchased a replacement light and bulb holder but still need a new electrical connector. Any other help to get these lights working would be greatly appreciated.