GM needs to import this, now.
If I were The Man this is what I'd do:
Setup a program whereby customers could place orders for any of the Commodore variants. Once a threshold of solid orders had been reached a production run would commence and the cars would be shipped to the states.
The bar for entry would be high. A substantial down-payment with considerable cold feet penalties. IE: none of this zero down no risk B.S. Serious buyers only. Bad credit, no money? GTFO.
It would be evangelized heavily in the online automotive communities.
In other words: make it possible for people who are serious about buying a Commodore be able to buy one. There would be no haggling. Your transaction would be directly with Holden/GM with the vehicle delivered to you by a contracted service at the location of your choosing.
You'd get the exact vehicle you want, Americanized with OnStar, HD Radio, XM/Sirius and US maps.
If this happened I'd be first in line for a SS Sportwagon with a manual gear box.
The miracle of the Internet makes this possible. You submit your order via a web portal. Documents for you to sign are generated dynamically upon your order and provided as a PDF for download. You print, sign and fax them in. At that point if your down-payment is not received (cashiers check, wire transfer, etc) within a set period, say thirty days the order is canceled. If you cancel more that twice you get the ban hammer.
You can finance of course, but I doubt your local lender will agree to it. GMAC on the other had would. Maybe even offer a great rate as part of a "import your crazy ass hoon wagon, mate!" promo.
Time to wake up... sigh.