Jericho

I'm looking for a left hand M6x20 screw replacement for my makita skill saw Model XSS02 I need to replace a screw however I don't want to order it because shipping times take too long and expedited shipping is like 30 bucks I'm trying to save cost and find a alternative where I can buy it in store can anybody give me some ideas The warranty's been up on it so so it really wouldn't matter if I went with the manufacturer's choice or not and I need it replaced yesterday