After many months of searching and one worthless purchase, I have tracked down a supplier
for high tensile head studs. I have purchased a set to check the fit. Anyone interested in a set studs, washers and nuts can supply for $148 plus postage. This price is based on a volume purchase. I will be placing an order in the next 2 weeks. Pick up Castle Hill of can post. Please send postcode for price on postage.