Best way to check is to put one of your wheels on my car, but as you're so damn far away that isn't gonna happen.
so, next best thing. with the wheel on the car, measure through your spokes from the disc to the inside of the spokes. Closest to the hub, half way up, and closest to the tyre. Post up what you have and I'll measure mine and then you can get a rough guide of how much you are likely to need. Also taking into account that the brembo discs are a bit thicker.
we should be able to get a 5 10 or 15mm idea.