Luke,
Checkout current unique cars Pg 181 - DRB with all the bits and soft top $40k (Qld) and Pg 242 - $59k (Vic) not sure of make and extras.
Also keep an eye on
www.carpoint.com.au I have seen up to 8 cobras for sale at certain times of the year. Bought mine through "All American" in WA. They advertise through Unique also. I watched my car in Unique Cars mag for several months and waited until it dropped in price.
Other options are get in touch with the local builders here in Vic. Laurie Bongailas - RCM, Doug Pearce Engineering, Kenmer engineering, Python etc they may have or know of cars for sale. Otherwise call the intersate builders they may also know of cars for sale.
Good luck.
Cheers
Tony