You can purchase them directly from Auslowe or possibly Sourkrauts Model Parts may stock them.
I suggested to Nigel that he offer Western Star shields, but he kinda blew me off. I'm sure if he gets enough requests he would have them made.
http://www.auslowe.com.au/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=982&category_id=42&option=com_virtuemart&Itemid=27
https://www.facebook.com/?ref=logo#!/photo.php?fbid=206866892806099&set=pb.174483366044452.-2207520000.1393000221.&type=3&theater
I still have the original 670 and 780 unbuilt from when Testors was the US distributor of Italeri. I have the Stralis and I will get the updated Hi-Way.
I am still hoping Italeri will have some new American kits to announce later on this year.
Not my "cup-of-tea", but it will be intersting to see who whines about paying "U.S. MSRP North of $45-50" when a big rig kit with twice as many parts cost only a few dollars more than that. I bet this will be out before the Moebius Ford kit.
The Ford Aeromax 106 is a reissue first offered around 1996. The engine is a Cummins NTC 400, which dates back to Italeri's first US truck kit that was first issued in the mid 1980s, the Freightliner FLC 120, which was recently reissued by Italeri.