Did you import those wheels or are they available locally?

I got them off www.summitracing.com as I have a account with them
It was the easiest way to get them for me, you might be able to contact them directly, but I doubt you would et as good a deal on freight. They were cheap. $690NZD landed including freight and customs charges.
I got 13x8s with a 3" back spacing as they clear my coil overs without spacers which was ideal really as most alloy 8s have around a zero offset which meant I would have had to have run a 25mm spacer on the front to clear the coil over

Are you still working on the car.