Any automotive paint store, including NAPA or PPG or whomever, will take these paint codes and mix up what you need. Piece of cake, just check yer yellow pages...
http://www.birfield.com -> click on LCML Archives and search on the words "paint code"
Pewter gray, dash panel colors, etc. all located....IIRC, the Cygnus White is the roof color, but don't quote me there...
JT Outfitters and CCOT both have the colors available as well.