I found two possible replacement parts. At O'Reilly auto parts they carry an Eiko 2721MF (12v 1.2W T1.5 base) . I bought several of these. They are a tight fit, but seem to work fine. I also bought some Napa 17035 bulbs. These are a loose fit, loose enough that if I wiggled the socket, the light would go out. I'll follow up in the future if I have any problems.