It looks like Radio Shack has 120V mini-neon lamps - that might be your easiest fix. I can't tell for sure, but it looks like the assembly may include the resistor internally.
I originally looked at Radio shack and didnt see anything that i thought would work, do you have a part number? Ill grab one and try it out.
This is what I found on the RadioShack website: 110VAC Snap-In Red Neon Indicator Lamp
It is not exactly what you currently have but it should work. This unit is rated at 110VAC so I think it should replace the existing bulb and resistor. There are other mini-neon lamps in different colors.