SOR sells em, I have a set kicking around for the doors and windshield.. I can try to find them if you are interested. When I was prepping mine for paint, I couldnt get the windshield screws out even with heat and an impact driver so I never installed the and just painted the existing ones on the rig.. IMO the factory ones painted properly look much better, less flashy. Try to loosen the screws before buying anything, it will save you some cash if they wont come off. I had a hell of a time trying to find the tapered screws as well, toyota doesnt make them anymore, only the flat backed ones. Cool cruisers sells those in stainless, I have a set of those kicking around as well.
Mike