i just bought a 91 b400, the guy before me put on some carbonfiber lookalike turn signals. They look good but the problem is that one of the bulbs burned out and i cant find a replacement for it. It is a very small bulb with two contacts on bottom. there are two filiments in bulb and two contacts in the bulb holder. on the factory turn signal is there one or two contacts on bulb holder? i could use any help you can give me.