Try a 1176 bulb. Two filaments of different output, but the pins are the same height. They are not super common, but when I look online I see my NAPA has a couple in stock. But you have to remember we are the land that time forgot. Retail at NAPA is $6.98 each, with a trade price of $3.88. I see them online for 41¢ each.
See here:
https://www.bulbtown.com/1176_Miniat...p/eiko1176.htm
https://www.topbulb.com/cec-1176-bul...-s8-ba15d-base
There are 6 volt and 24 volts equivalent bulbs as well if I remember correctly. Back in my tool crib days, I knew these numbers off the top of my head, but I will admit to having to look them up these days.