I hate to revive an old dead thread, but I wanted to mention I bought these 37mm bulbs for $4.50 shipped and they worked and fit perfectly. No bulb out light or anything.
37mm 0.4W 6500K 40LM 2-SMD LED Reading Lamp/Boot Lamp White Light Bulb (DC 12~18V/Pair) - Worldwide Free Shipping - DX