When I bought my 2013 GT, it was missing the underneath front splash guard. I ordered a new one for about $70 only to find out it couldn't be mounted without the front lower valance (which was also missing). The cheap aftermarket ones attach to the stock one. I don't want to pay hundreds of dollars for one. The cheapest I can find is about $230 on ebay (new stock replacement part# DR3Z17D957AA). I can't find any salvage yards that carry newer than 2009 besides those that sell entire sections...
2013-2014 front lower valance