Hi Pleiades +Sweller, since posting this thread I have found out there is a place locally called Arun Fasteners and you can do as Pleiades suggests....hand the guy your original bolts and he hands you the equivalent in stainless. The 'hot tip' is not to pee him off by handing him loads of different bolts in one go and expect instant service!! Just one thing, do you guy's use copperslip with every bolt .?