First one I thought of was the princess calipers M16 fitting, you can get kits to convert to a wider disc as well for these.
Rallye Sport do the as well as others, I would have a word with BIGGRED.CO.UK if you want set as his prices are VERY good.
tabetha
ps post some piccies up when done!!, KITTEN's are VERY underrated and go round corners like they are on rails, use it, it will shock loads of boy racers!!