http://www.yrm-metal-solutions.co.uk/epages/BT4822.sf/en_GB/?ObjectPath=/Shops/BT4822/Products/175
Found these and I think it's my only solution but what a bodge! Wonder if there is anything else I can do hmm
I found this statement interesting
'A4-80 is the equivalent of Mild Steel 8.8 high tensile bolts'
I don't think you would class 8.8 bolts/nuts as mild steel.
Anyway seems a option though and a known issue. Would you be happy with it?