The best source of that sort of information is the Federal Chamber of Automotive Industries (FCAI). You could also ask Ford and Holden.

What you bought is an old car, and old cars are often worn out, so what you’ve replaced is not to be unexpected. You’re so far into it that it’s best to keep going rather than pull out and lose what you’ve put into it, particularly because it’s an SL/E, which will be worth more than a regular old Commodore when you’ve finished it. The ultimate decision on how much to invest in the car should be based on the condition of the body and interior. If all of that’s in good condition it would be worth spending the money you’re spending, but if it’s rusty or needs repairs to the panel work I would suggest you think about getting out of it.

IT'S hard to say how many are left, but one thing is certain, many have gone to that automotive graveyard in the sky. Given their numbers are thinning it's fair to say they will become collectable, and their value should go up. If you're thinking of buying one as a classic with the potential to increase in value, buy an SL/E.