You can get a W900B cab & hood from Gary Wallace at GW Trucks (gwtrucks@yahoo.com). One thing you might consider is using the cab & sleeper from the Revell USA snap kit, and replace the square doors with the round doors from the AMT T600 kit.
Have fun & post pics,
Looks really nice, Neil. Your MaxxForce is quite nice.
Shawn is correct, your seat bases are reversed. I know, you built it to the instruction booklet, but the instruction booklet is incorrect.
Looks like an interesting project. Interesting that you say "yellow & green", because in the video it looks like yellow & blue. The pic on Hank's does look yellow & green, though.