A friend has those wheels and I have replaced the cones before but I don't know where he got them. Try these people for the size and order them on-line. http://wheelsmfg.com/tech/PDF/wheels_cone_chart.pdf
Here! http://www.bikeparts.com/page_result...tegoryName=HUB PARTS&selCategory=1402&selManufacturer=225&ManufacturerName=WHEELS&selType=&strSearchString=&display Name=&sortPrice=