I've got a pair of 308mm Black Diamond Cross Drilled Discs for sale. No marks or grooves in the faces. Very little use. I also have a set of EBC Redstuff Ceramic pads to go with them. The pads have done about 50 miles!
Will fit Vectra, Astra & Zafira. You will also need to have upgraded your caliper brackets for these discs to fit.
£70 + £10 postage.