Whiteline also do the front camber bolts, I am using them. A recent thread on Squadra916 states that the V6s use 12mm bolts and the 2 litre cars 10mm. Eper states that all models use 10mm bolts, but would seem to be wrong.
I filed out the rear ball joints holes, be aware that there is quite a lot of metal to remove and it is hard & long work, I would recommend to use a machine shop if you can find a friendly reasonably priced one. Spare ball joints are available on ebay for £34.14 each delivered.