[Sandwichentity]

Hi all, I've recently brought a CRF 450R 2007 as a project, the engine is pretty badly damaged. I'm looking at my options for repairing/replacing the cyclinder head, and I was just wondering what year heads would fit on my bike, as there is quite a few for sale but none of them are off 2005-2008 engines. (Which is the years I believe my engine was the same for?)