G'day Dave, welcome to the forum. As you will see, I have been here for quite some time and my story is very similar to yours in that it was my wife who said, "that is your new car"
I put money down last November and I am patiently waiting for the 300C release. I have a direct contact in Chrysler HQ here in Melbourne and get a "news" update from him every 3 or so months on the progress of production in Austria and the finalisation of the Aussie car's specifications.
Yeah, I have my mesh grille in the cupboard at home too and I have been exploring the import of TIS03 20" with Pirelli P-Zeros. I have hit a bit of a problem with communication breakdown with a couple of potential wheel/tyre dealers in the US. Some will not ship outside North America and the biggest issue I have is the type and cost of shipping. Seems they can only deal with airfreight and the quote is around US$700. Remember you have to pay duty and GST on the whole cost (including freight). I don't need the wheels & tyres until November and I thought shipping by sea would be the best alternative.
Drop me a personal message and we can exchange e-mail addresses.