Gauge light bulb spec?

Hey all,

Quick question... Speedo light doesn't work. Worked once, doesn't come on anymore. All the other gauge and shifter lights work. I got the original owners manual with the car (64 Valiant) and I just spent some time reading it. It specs all the instrument cluster lights as type 57.

That's not a familiar bulb type to me. What's the modern replacement type for it, or am I just blind and not recognizing 'em on the shelf? My local parts store lists NO parts for my car so I'm on my own.

I'm sure I need to just clean some contacts, but in the interest of having everything I need in place, i'd rather have a bulb handy. :)

Actually... while i'm on it, what's the procedure for replacing the bulb? Unscrew the IP surround and drop it forward, or do I have to reach behind and cut my hands up?