Good luck! Not only have recordings and films deteriorated over the years, but NBC was incredibly sloppy about any standards for the color consistency of the peacock. I have seen actual film copies that apparently were intended for use on the air that had horrendous exposure, contrast, and color problems. Of course, they were also faded towards pink due to age, but you could tell that they were't good originally. You can see this in some of the videos on the web - the green is practically gray, yellow turning orange or overexposed, and the white part totally burned out while other colors are excessively dark. Every published version in magazines, on other advertising items, even the NBC Peacock board game, had a different version of the colors. It is much easier to make a collection of "all the many (bad) versions of the peacock" than to find even one definitive good copy.
This will give you an idea of what it should look like:
http://www.big13.net/NBC%20Peacock/NBCPeacock1.htm
I have NEVER seen it look like this anywhere else.
If you do find good ones, I'd be happy to go in on the cost of acquisition and cover material costs for a non-profit copy.