Could always try these - http://www.shop4fasteners.co.uk/acat...Plated_BZP.asp

M12 x 220 8.8 Bolts - £15.63+vat for 20 off

I have used them recently for blind rivets.

Stainless steel / Aluminium 500 for £13.39, they came the next day in a cardboard dispenser type box.

All in all a good shopping experience.

Cheers Ginge

bolts again
 

Here is a link for Diff and rear upright bolts.
m12 x 210 £3.00 each
M12 x 250 £5.45 each :)

http://www.thomassmithfasteners.com/