just had a look and the nuts are 8 rated so I'm thinking all I'll need is bolts to match these, am I right?

Also found out that stainless bolts have roughly 85% of the strength of an 8.8 rated bolt so that would make them 7.48.

"The vast majority of stainless fasteners listed on this site are grade A2-70, and have approximately 85% of the tensile strength of grade 8.8 steel bolts. As such, stainless fasteners are only recommended for non-stressed applications, which effectively rules out brake calipers, suspension mountings, brake discs, seatbelt anchors and propshaft bolts"