If you are in Sydney, try calling Masbolt in Wetherill Park, they have stainless bolts as well as Zinc plated hardened steel ones (probably what BMW use). Be sure to get plated ones... if not stainless. The locking nuts are referred to universally here as 'Nyloc nuts'. Once you have the spec ie M10x65mm or whatever they measure up to be you'll be ok. You probably know but JIC be sure that the bolts will be metric a lot of Aussie fasteners are still imperial... good luck... GP