Your search for "cargo" revealed the following
Cargo Car Green with Present Cargo Wooden - Used
Thomas Brand Red Cargo Car with Present Cargo
$22.50 CAD
Cargo Car Blue with Sodor Candy Factory Cargo Wooden - Used
Thomas Brand Used Cargo Car Blue with Saw Cargo Car Wooden
$17.50 CAD
Cargo Car Black (2000) with Cheerios Cargo #1 Good Condition Rare Wooden - Used
Thomas Brand Cargo Car Black with Cheerios Cargo Wooden
$57.50 CAD
Red Tall Cargo Car (Mattel) from James Sorts it Out Accessary Pack Wooden - Used
Thomas brand used wooden Egg Car with magnetic egg cargo
$17.50 CAD
Cargo Car with Cargo Other Brand Wooden - Used
Other Brand Cargo Car with Other Brand Cargo Wooden
$7.50 CAD
Sodor Cargo Co. Crane Clickity Clack Good Condition Wooden - Used
Thomas brand used Cargo Crane for the wooden railway. You may want to add cargo cars and you can purchase them here
$49.97 CAD