Craftsman sold a replacement tool component set for the Kershaw A100, Craftsman 45516 MTs. It was labelled as 45517 and included a new knife blade (and the other components as well. They pop up on eBay every now and then.
Or you could talk to loki-mobile, I sent him a rough A100 a while back to get the sizes for the knurled screws.
babola: "Enjoy your tools and don't be afraid to air your opinion and feelings here, but do it in courteous and respectable way toward others, of course."