Rzr 800 Roll Cage

Hi everyone I'm new to this site.

I have a question. Does anyone know if a Rzr 900 stock roll cage will fit a regular 800 Rzr. If so or not my buddy just bought a 2012 Rzr 800 and it was wrecked. He needs a new roll cage and the 900 cages are more plentiful on ebay. Just wondering if anyone knows or has a cage for sale.

Thanks

Barry