The Lumina existed as value special to attract private buyers. Ever since the VT-VX, Holden has been releasing a regular stream of limited edition models. Ford was wise and followed suit with the AU.
Then again, BA is so blatantly aimed at private buyers to start with, maybe it doesn't need limited edition models so much.
Jack Travis, E-Series Acting President
1989 Ford Fairmont Ghia turbo/GL replica (underway)
1994 Eunos 800M
1990 Ford Laser S