Your search for "cargo" revealed the following
Talking Percy with Cargo Car (2019) Used - Trackmaster Revolution
Thomas brand used motorized Trackmaster Percy - Percy talks when button pressed but not on track Talking trains with the large red 'T' button can interact with each other! See below for example of how these trains work. Item may not be identical to the one shown in the video....
$27.50 CAD
Cargo Car and Cargo Golden Bear My First Thomas - Used
Large plastic Golden Bear Cargo Car
$17.50 CAD
Cargo Car Orange with Blue Cargo Wooden - Used
Thomas brand used wooden orange cargo car with Blue cargo
$12.50 CAD
Misty Island Crane with Cargo Car #2 Wooden - Used
Thomas brand used wooden Misty Crane. We suggest adding a cargo car
$60.00 CAD
Logan with Cargo Car and Book (no cover for book) (Mattel) Good Condition Wooden - Used
Thomas brand used wooden Logan - rare!
$150.00 CAD
Sodor Cargo Co. Crane #1 Clickity Clack Small Marks with Cargo Car (1997) Wooden - Used
Thomas brand used Cargo Crane for the wooden railway. You may want to add cargo cars and you can purchase them here
$59.97 CAD
Gina and Cargo Car with Drill #1 (2013 Mattel) Good Condition Used - Trackmaster Revolution
Trackmaster Gina
$39.97 CAD
Timothy and Cargo Cars (Missing Cargo) (2013) Good Condition Used - Trackmaster Revolution
Thomas brand used Battery Timothy and cargo cars 2013 Mattel
$42.50 CAD