The switch, though clearly a special style, looks like a standard toggle switch, though perhaps one meant for a deep mounting. Something *like* the one in the link below, but I would definitely take the old switch out, and measure the diameter of the hole, and look at the form of the switch to be certain. Then, just look on ebay, google, and digikey for a switch that fits the hole diameter AND depth, and functions like it's required to (probably just ON/OFF SPST).
I doubt you'll find a switch that looks like the original, but I'm 99% sure that a standard toggle will fit and function.
[URL unfurl="true"]http://https//www.ebay.com/itm/Toggle-Switch-SPDT-10A-250V-QuikConnct/221557652640?epid=15014270672&hash=item3395dd7ca0%3Ag%3Au%7EIAAOSwUlxaCemC%3Asc%3AShippingMethodStandard%2160202%21US%21-1&_sacat=0&_nkw=toggle+switch&_from=R40&rt=nc&_trksid=p2380057.[/URL]