Alfetta Wheel Nuts - Need set of 16

[Alfa Aussie]

Hi guys

I'm fitting a set of Alfetta GCL wheels back onto my GCL and need 16 nuts for them.

Standard M12x1.50 nuts don't give enough thread turns (only getting 7 turns and need at least 10) becuase the wheel is fairly thick so need Extended Thread (ET) nuts with the shaft that fits in side the wheel - but can't find any off the shelf that fit the 15mm wheel holes.

Standard 60 degree taper of course.

Anyone got original Alfa alloy style ET wheel nuts?

Wheel looks like the photo