Exup - stainless bolt set?

[kebab19]

Thanks for the responses.  I took Robbo's advice and went to a local Screwfix for the parts.  Was surprised when they handed over bags of 100 parts for each bolt, only came to £7 in total although they are high tensile steel as opposed to stainless.
Oh well, have enough spares now to dispose of them every year  & install a new set until about 2050 AD  :lol

Next job, separating the exup valve away from the bush / exhaust side plate as they appear to have congealed after nearly 16 years together...