There's no such thing as a 'standard dual coil'
The Kingo is a generic eGo battery that's paired with what looks like an upgraded Evod dual coil atomiser.
the heads it uses look specific to Kingo clearomisers. So unless you can find a UK alternative supplier you're locked into that for repplacement heads.
However the Kingo battery looks from what I've seen to be a standard eGo looky likey battery so you could buy an actual Evod or a mini PT2 and use Kanger heads or one of the Aspire smaller clearos and use Aspire heads and so on. You can use a 510 connection atomiser/clearomiser on almost any other battery out there.
Each manufacturer uses their own design of replacement coils in an attempt to keep you buying their own specific brand. Some head designs are very popular (kanger/aspire) and are widely available and cheaper as a result. Other ones aren't. I've no idea whether or not the Kingo heads are worth spending the extra on as I've never used one.