i replaced both of mine with aftermarket from year-one. they are coupe quarters but, my body guy said the fit was great. and they do look great installed. year-one part # KQ468LH for left & KQ468RH for the right @ $139.00 each. or the pair KQ468LHRH @ $265.00 these are quarter skins, not quarter panels.
year-one has a good tech department also and can answer most questions you might have, and they aren't too lazy to go back to the warehouse and make comparisons between parts. year-one 1-800-932-7663
NPD also carries a quarter skin. but i have not seen these. they are not as expensive and since npd has a depot in michigan, it will save some serious $$$$ on shipping. npd part # c-12940-233a (right)@$114.50 & c-12940-224a (left)@$114.50 npd 1-800-521-6104