So where is he getting these from?? Has a third supplier of Norton heads started up, or has he found a source of NOS heads?New Genuine 850 Commando Cylinder Heads Cost £997 + Vat So This Is An Excellent Opportunity To Get A Restorable Second Hand Cylinder Head. Never Fit A Pattern Commando Cylinder Head To Your Motorcycle Especially When Pattern Ones Cost More Than Our Genuine New Ones