Jane,
Welcome to classicoldsmobile.com. Purchaced your '72 new??? WOW!
You are indeed replying to the bumper question. If you check the dates, the original posts were about 2 1/2 years ago...holy resurrected thread, Batman!
I happen to have a '72 parts car with an owner's manual. We can talk about it through private message, but I promise that I don't charge crazy ebay prices.
Color chart? Would this help?
http://www.tcpglobal.com/autocolorlibrary/
C.J.