#47 pilot lamps - still available?

[Jeffhs]

I have a Zenith H-511 radio that uses a #47 pilot lamp. I'm wondering if these lamps are still available. I would like to have one or two spares on hand, as the H511 uses the pilot lamp as an inrush current limiter and is also an integral part of the power supply; if the bulb burns out it will cause the 35W4 rectifier tube to run hotter than normal, and could endanger the other tubes as well. I'll try Radio Shack, as the last time I needed a pilot light for my set (about six years ago, after the original burned out due to a deformed electrolytic filter capacitor) they had them in packs of two. However, with RS now being largely if not totally out of the consumer electronics business (their focus nowadays seems to be on computers, high-definition TV, and home theater gear), I'm not sure I'll have much luck finding anything much in the way of pilot lamps or any kind of small components.

Thanks in advance.