2013 YFZ450 cam problem

i bought stage 3 hot cams for and 04-09 carb model thinking they would fit mine fine, and after doing a little research i found out that they wont work.
the vales and springs are apparently much shorter than the older carb models. does anybody have any experience with this? What cams do fit the 2013 carb models?
Can i buy different valves and springs and then would the hot cam i purchased work? Any help would be great thanks.