I bought a used '13 CTSV Sedan M6 with black diamond tri-coat exterior and these lips under the rocker panes (as seen below): I need to repair/replace one of them due to some damage, and I am unable to find either the original P/N (if they are factory) or the aftermarket supplier if they are...

I am just wonder what rear spoiler options there are out there. I like the new ATS V and CTSV ones, but I know they have a more rounded shape to them. Please share your pics and comments. Thanks!

Would you guys happen to know what colors Cadillac offered for each year?