I blew up one of my volcano buttons, because I am stupid (there's a thread about it from last week or so).
I took the blown one to the local arcade machine / juke box distributor and asked, "got any of these?" The guy looked at me funny (lots of people look at me funny for some reason) and wandered off. I thought perhaps he didn't think I was worth his time, so I perused the retired juke box CDs for a while.
After a few minutes he came back with a handful of them and asked me how many I'd want, and that they were expensive because they don't make them any more.
"How expensive?"
"$6 each"
"I'll take two."
The ones he had are the "low black cone" kind, and the one I wanted to replace is a "high silver cone."
The cones are interchangable. The low black cone has threads on the inside diameter for the switch to screw up into, and threads on the outside diameter so it can accept a nut and afix itself to the metal CP. The high silver cone is just a round nut that comes off when you take the switch off the panel.
The mounting hole necessary for the low black cone is bigger than the high silver one... 1/2" vs. 3/8" maybe, I don't have calipers on me.
Now if I can just figure out the voodoo of resistors, I should be able to have lit volcano buttons on my machine again!