Tim,
That mate of mine at Oulton had the full Brembo/JHP conversion, think the CNC fork bottoms were in excess of £700, the brake lines alone were over £400, I think he got a bit of a deal, as he knows Mark Griffiths pretty well (Renegade boss), think the whole setup cost him just over 2K, using some of their unused calipers/discs etc, should be about 3k I reckon.
Saying that they maybe for sale, as he has just replaced that 996R with a brand new 998F02 race bike, still in the crate, don't even want to guess the cost of that thing !