If you guys need shims to tighten up the suspension on your Mini's Take Off makes a 4mm i.d. titanium shim kit. They are great for getting the slop out of the upper camber links. I used motor shims fo my lower suspension arms.
You get:
10 - 0.1mm shims
10 - 0.2mm shims
10 - 0.3mm shims
TT303 for $5.99
They also make Magnesium clamping Wheel hexes that fit the Mini.
TM002 4pk for $29.99