I don't think any true numbers are know for any model Camaro. But one's best chance of locating info is on cars sold in Canada... CRG only says they were, in fact, also sold in Canada. They do list a number of US dealers. But no Canadian. You can get on the forums there and get some good info from the guys that were actually there!
You also have to know what COPO number, i.e. 9561, 9560, '69 Yenkos, and/or 9737 to know total production of each, which was 1015, 69, 199(201?), and unknown(?) respectively (source: http://www.holisticpage.com/camaro/camaros/copo.htm
Some other COPO info:
I could have sworn there was a web page with a registry. Maybe that was just for the ZL1s.?.?