Replacement OEM screws polished against stainless steel

Hello guys, even if we are still at the beginning of the season I think about the next long winter evenings. In this connection I am looking for screws kits made of stainless steel (if possible polished) that I can use atstelle the OEM screws. I have already searched the internet and besides the kit of AlloyBolts not really found anything. But with the kit I am not quite sure, because I can’t do anything with GRADE8. Does one of you have an idea where you can get a screw kit. Thank you for your help.