I'm using a MK5 brake m/c from a Mondeo in my kit car.
On the left is one of the unions for the m/c, as best as i can tell it's an M12 x 1.5mm for a 1/4" pipe. Can anyone confirm this?
On the right is an M12 x 1.0mm for comparison.

I want to use 3/16" brake pipe and would rather not muck around with a series of adapters.
So I want to buy two male M12 x 1.5mm unions for a 3/16" pipe.

Plenty in America, but can't find anywhere that sells then in the UK?
Any suggestions?