The problem is the passenger side head is broken at the exhaust side, as you can see:
<a href="http://s1072.photobucket.com/user/laurentlesage/media/DSC_0346_zpscda6880a.jpg.html" target="_blank"><img src="http://i1072.photobucket.com/albums/w364/laurentlesage/DSC_0346_zpscda6880a.jpg" border="0" alt=" photo DSC_0346_zpscda6880a.jpg"/></a>

I would like to go for the cheapest option, but I know I have to buy at least one similar head.
I never deal with a machine shop and don't have any idea of what it will cost!

Thanks


Laurent