2011 chevy hhr fog lights.....help?

i just purchased a 2011 chevy hhr which came with no fog lights just the black louvered knockout plugs.after removing them i found that it is not circular.it's a circle thats been cut off at the top,which makes it straight across the top.i called chevy and the don't offer any kits or lights at all{way to go chevy}.aftermarket fog lights leave a gap around the opening.i would like to have it look as close to factory as i can.doe's anyone have any suggestions as what to do.thanks for your help....MR.B