I am so sorry about this. I messed up when I set up the campaign thinking I could handle international orders as a simple add-on for shipping. Nope.
So here is the solution I can offer.
1. Figure out what pledge you would like to make.
2. To deal with the international shipping cost add $10 to the pledge amount. For example, if you want to pledge at the $100 level enter $110 as your pledge (the pledge plus the international shipping).
3. Instead of selecting the reward at that level, though, select No Reward. Kickstarter will process your pledge.
4. I will be contacting you by email, most likely within 24 hours of your pledge, to thank you.
5. Reply to that email and let me know you actually want your rewards. I will make it happen!
Thanks, and sorry for my error.