Ok thanks Spider,
You've convinced me the spacers are out and so I need to source some custom mags from Australia though.
Chrisnealewheels has some but all the good stuff is 5 hole or bigger than 15 inch.
I'll keep looking for custom 4/101.6 wheels that can bolt straight on with the right ET and being 15x7 format.
My shopping would be so much easier if I lived in England with all you guys.