I have changed my cloth seats to OEM red SS few years ago (ordered from the internet) and it simply fit perfectly.
http://www.camaro5.com/forums/showthread.php?t=130004
http://www.camaro5.com/forums/showthread.php?t=125213
in your case, you don't need to swap the whole seat since the SS passenger seat is 2011 or older & not fully automated. keep the seat base and swap everything else