I had the exact same situation, Moley, on my 1100 Evo. A pair of OE discs from Moto Rapido was £480 so I went for the Serie Oro option at £285 from Simon at WSC Performance.
Serie Oro, left - OE, right
They're slightly lighter than stock and the general consensus seems to be that they're a better quality too. I've certainly had no problems since fitting them.
I think you'd need the 78B408A4 and look to pay around £165 per disc. Don't forget to budget for new pads too. Drop Simon an email for a quote.
simon@wscperformance.co.uk
http://www.ukmonster.co.uk/monster/s...d.php?p=551847