Use your local motor factors, and the amount you save waiting and on postage could be put to cover the difference for green or red road spec pads, well worth the extra few pennies, if you do the discs too you would only need cross drilled to get the benefits, slots can be harsh on your pads. Take the wheel off and check the caliper you got before you order or get your bits, all the details will be on there, and measure the disc that will help alot too, shop around your factors though some are cheaper, i've used pcs, ces and romac in the derby area, all seem to be good stuff and all around the same prices.