H&S is now making conditioners as well - I wonder if they have cones in them? That might be something to look in to.
Also, try some tea tree EO mixed in to your conditioner (just a few drops until you figure out how much you need). You might be shocked how well that works.
And Becci, if you go back to the flat irons, I'll cross the pond myself and beat your curly little butt!
Do you know how many women would KILL for the progress you've made in the last three weeks? Keep at it - you can get rid of the itchies. I remember about three weeks into CG I had a bad case of them, too - just like what you're describing. Try doing a wavy wash once a week to help alleviate the symptoms, and you should make it through the transition just fine. It's just your scalp freaking out and wanting to know where it's usual "fix" is. Now you have to opportunity to find a new fix, and get your scalp used to it before your wedding!