18 inch VW Chicago rim from passat 3c or 2007 EOS - image attached

[Mite_a]

Hi all, I recently got a flat tire only to find out that my rim has a hairline fracture in it.
I'm after a replacement or even a way to fix it.

http://www.myturbodiesel.com/images/wheels/vw_18_5x112/chicago.jpg