I have a 2007 150 Lariat and can get a good deal on a 2010 150 Extang Trifecta tonneau cover on craigslist for 61/2 foot bed.Will the 2009 -2013 cover fit? The extang site says 2004-2008 are different.If so. How? I checked my 2007 specs and says length is .250 longer.Other sites state newer models have longer lip on tailgate.I am confused. Any help would be great.