Just remember the current NZ regs prohibit use of bolt on spacers over 27mm thick (slip-on 10mm max.)
I will have some CNC machined 27mm spacers (T6 Ali) available sometime after xmas, probably in the $120/pr price bracket. The ones I am using at the moment I can have machined for around $350/pr so the new ones I am getting will be a considerable improvement
Cheers
Steve
PS: Rik, you might find some 6-10mm slip-ons will do the trick for you. We can throw some washers on and do some measurements...