Chipmunk

Hi Guys,
I just downloaded cocos2d for Win8 and I see that is it really powerful and really good to use,
I am currently trying to port an Ipad App written with cocos2d and chipmunk to Windows 8

My question is:

  1. Is this possible because the latest release of cocos2d for Win8 does not have chipmunk.
  2. Is there and alternative I can use ?

Please help guys,

Thanks
Ronak