Holden.co.uk would probably be the place to go first for your steering bosses' needs (they have plain steel too).
I think that this is a stunning vehicle and I would dearly love one. But from a usage / space / cost point of view it would need to be a swap for my +8 - which does not make a lot of sense too me at the moment.
If I was in a position to buy one, I would be torn between getting one now or waiting for an S2. With so many changes from the ACE there is a lot of untried technology on this. With the MMC being such a small company it is inevitable that the product has to be customer-developed - a standard risk with early adopters.