Up for sale here is this lot of 3 NOS Dialco vintage indicator lamps. These do not have bulbs or covers, so you'll need to find those. These are nice extra-large-sized indicator lamps. I believe these are AC pilot lights, though you may be able to put DC bulbs in--I do not know. These are really cool vintage pilot light/indicator lamps, and they would look great on a home-made custom tube amplifier or what-have-you. Please see my pictures for details and measurements.
US shipping and handling is $5, and international is $18. If you have any questions, please ask.
I have a number of other vintage pilot lights and other vintage electronics listed--feel free to take a look!