In case you missed it, SCS Software has now released the International LoneStar truck for American Truck Simulator.

The International LoneStar arrives as a free DLC addition for every owner of American Truck Simulator. Find the latest update on your Steam Client to receive this new addition to your library.
*NOTE this may require a restart 

International LoneStar Truck

International LoneStar Interior

Read more at SCS Software blog