Auto body repair & detailing: Part number question..., gm dealerships, fender bender

Question
Mr. Schwandt:
I've got a 1979 Chevrolet El Camino...decent shape, and I drive it a good bit.  Had a little fender bender recently, alas...and need to get a headlight bezel for the driver's side.  I thought about trying to bid for one on eBay, since they pop up there frequently.  But I want to make sure I get EXACTLY the right one, since they changed slightly every couple of years.
Is there a website or other resource where I can go to look up the EXACT part number for that year/model?
Also, I'd like to get some "touch up" paint (only got one little small scratch), and I wondered if there is a website or other resource where I can find out EXACTLY what color I need.  (Doesn't a car's VIN number have a code that identifies color?)
Any suggestions or advice greatly appreciated.
Warm regards,
David Gardner
davidg32@yahoo.com  

Answer
Just call your GM dealership and ask for the part Number for that year and option package (chrome, black, Etc.) or stop down there and then you have the car there if they need to see it. I don't know of a website for that sort of thing sorry. The paint you can get a touch up stick or spray can at your local Napa type store. There is a paint code on your door sticker or on a sticker in your glove compartment. GM dealerships may be able to get a paint code from the Vin number.
                Thank you for the question !
                Ken