Just looking for a spare seat and I found a 2007 and a 2008 450 XCF. Need it to fit my 2009 450 XCF. Looked up part numbers and they are different from my 2009. Will they still fit? I didn't think there was any diff in the 2007-2011 year but you never know? The part number different could be something as simple as a slightly different foam used to a different nylon/plastic in the foam base. If you know for sure the seats will interchange please let me know.