I bought a set of brembo high carbon 340mm discs with a discount code from Opieoils who advertise on this forum. Can well recommend - the bells and edges of the discs are treated with some coating, and they still aren't rusting now (I had them fitted mid/late 2015 I think).
I picked up on these discs from a user called Beddie - will look up the part no's if you like. I have these with a set of DS2500 pads on the front. They've served me well - a little squeak from the pads at very low speed, but otherwise good.