Welcome to Team Camaro.
Q1 - ebay and craigslist seem to have a good selection and good search engine, but has just as many scammers as honest sellers. Buyer beware.
Any site that welcomes car enthusists and has member forums is ussually a good place to look.
Depending on your flavor, check out places like: www.Musclecar.com www.camaros.com www.chevelles.com www.corvettes.com
Q2 - Properly, you would look for VIN, POP, TRIMTAG, BuildSheet (also known as broadcast sheet), Dealer sticker.
Very few 1st gens have it all, and if they do they're out of my price range.
There are several hidden VINs on 1st gen Camaros which are also important to verify.
If you can't find all
of the above, a VIN, TT and POP can help determine the other info.
Q3 - www.trimtags.com
does sell replacement TT and VIN plates.
This is a tricky area, if you contact them, they will tell you that reproducing and selling Trimtags is not illegal, but attaching them to a different car is fraud.
Q4 - yes, Team Camaro has lots of Aussies, and Yanks, and Brits, and Canucks, and you get the idea.
Team Camaro is the best Camaro club on the internet, and we're all one big happy family.
Remember, siblings don't always agree, but they'll be the first to ask for pics of your Camaro!