Dont be so sure they wont be available.
I know you can buy bodies for 69 camaros and last I heard the 70 challenger is still in development (was on display at SEMA last year), but I think some have sold, or have they cancelled plans to sell it?
In fact, there is at least one company that can sell you a 69 camaro, titled as a new car, complete for about $75k, or at least that was the price about 3 years ago. As I recall the body alone, "almost" ready for paint was about $14k, plus about $1500 shipping. I even went to the time of researching the pricing to complete one myself, with a nice modern pro touring concept in mind, and I came up with a parts cost and paint/body of about $60k total, plus my assembly labor. I still have my spreadsheet on it around somewhere. Talk about a waste of hours and hours of my online time. Oh well, at least I learned a little something about camaros. That, and a couple bucks might get me a cup of coffee at coffeebucks