I'm almost positive that you'll be able to reuse the mounting bolts that are already on the car. The camber bolts will most likely be reusable, but you won't know 100% for sure until you try to install them. I'm pretty sure you have another car to drive, so if the STi is out of commission for a week, it shouldn't be a problem...right? If that is the case, attempt the install using the mounting and camber bolts that are already on the car. If you find that the factory camber bolts don't fit, then you can order new ones.
When you are removing the current struts, look closely at the head of the camber bolts. They should have a small arrow, number or other indicator on them. Get a sharpie and make a mark on the knuckle that matches the orientation of the indicator mark (the indicator mark is relative to the lobe that Black Bandit mentioned). This way, when you reinstall the camber bolts later, you can line up the indicator with the sharpie marking. This will get your alignment "relatively" close, so you can safely drive a SHORT distance to get a professional alignment. This is critical....SHORT distance. Even if the car seems to drive okay, you need an alignment ASAP.
I may still have a brand new set of Group N top hats for the front. I'll look around in the garage for you if you like.