Just search 69 Camaro and Nova in ebay motors, parts and accesories. I will keep a look out too. Also search proportioning valve.
here are a couple, even if you buy one and don't use it, you can always re sell it.
http://cgi.ebay.com/ebaymotors/69-Camaro...sQ5fAccessories
http://cgi.ebay.com/ebaymotors/67-68-69-...sQ5fAccessories