Theortically approx 2,400 RS2000s built in AUS. Have seen an original hard copy of the production brief limiting 4 doors to no more than 45 per month or 1/3 of total production - that would make max production of 4 door from 5/79 to 10/80 to be 800 by number or 800 by percentage split. Many years on and I'm still trying to find another copy of that brief....