http://www.wheelspacer.com/ These guys make custom spacers... they did Wildwhl's & Lawfive's. So they'll have the specs for the V in their system...
With 11 - 13mm in the rear, you'll need longer wheel studs. The biggest you can safely go w/stock studs is ~0.25 inches.
I've never heard of a 1mm spacer... i'm not sure if anyone will make you one of those.
There is a company that makes 'off-the-shelf' 1/4" spacers (non-hubcentric)... that's where I got some for testing... but i cant remember their name
I thought you had stock wheels
