Hopefully the bulb is found. Those bulbs were everywhere when I was a kid, so surely it can't be too hard to find? Unless it is some super specific frequency of light, which I highly doubt. The bulb could be tested by going to a store that still develops film and asking them for one of their empty disposable camera shells and hooking up the flash circuit from it. I used to use those circuits as jury-rigged Tasers when I was a little kid at school :D