Expedition Exchange has this
. It's a dome light switch but also can be used for Hellas. $33.
MudStuff.co.uk has some OEM style switches
. They're E-Switch's R5 Series
, and can be found here and there on this side of the pond. And much cheaper than EE's offering. If you use the "configurator" on the E-Switch site (which generates a part no.) be advised that if you want something special you probably won't be able to find it for sale singly.
I'm making some additions right now and also wanted a stock-ish look for the switches. In that panel of three square switch openings I will have a switch for the compressor, a double switch for Hellas and (in the future) spotting lamps, and an interior winch control switch. I found the double switch on eBay.
Hope that helps.