I'm looking for leaf switches like the ones used on the Disks Of Tron spinner.
From the pictures I found of the spinner, they seem to have 3 leaf springs on them, 2 are used for the actual switch and a 3rd one is probably used as a spring to keep tension on the spinner so it doesn't just go up and down when spinning the knob.
I'm in the process of building a DOT spinner and if everything is successfull I might even build some to sell to all the MAME/DOT fans out there!
I'm in Canada near Montreal and I also have a PO Box in the US for easier shipping.