Couldn't find any decent ones used, so went searching. www.Amesperformance.com These guys cater to the GTO/Firebird crowd, but they had reproduction Sill Plates for the 1973-1977 GTO/Lemans/Grand Am that fit the Century/Regal/GS etc. A bit pricey at around $80.00 for the pair. Also made in Taiwan, which I am not fond of, but the fit is perfect and the thickness is comparable to stock. Chrome on the pair I received was flawless.