We have just found some sets of Ripspeed wheel bolt kits.
They are M12 x 1.5 as used by Mini R52 R53 R56 early Lotus Renult Suzuki etc.
They are complete with 4 73.1 x 60.1 spigot rings
If you don't want the spigot rings we have some unboxed nuts at £7,50 for 16
We also have M12 x 1.5 bolt kits at the same prices
If you can't pick up we can send to most of the UK for £4