Your search for "cargo" revealed the following
Sodor Cargo Co. Crane #2 Clickity Clack 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
$69.97 CAD
Cargo Value Pack #9 Used - Trackmaster/Trackmaster Revolution
Cargo cars for Trackmaster Railway
$7.50 CAD
Present Cargo Car with Present Cargo (Learning Curve) Good Condition Wooden - Used
Thomas brand used wooden present car with magnetic present cargo Learning Curve 2003
$17.50 CAD
$25.00 CAD
Sodor Cargo Drop with Fair Condition Cargo Car & Cargo #3 Wooden - Used
Thomas brand used cargo drop station.
$29.97 CAD
Cargo Car - Snake Cargo Car Used - MINIS
Used Mini as shown. Please note minis are individual trains and are not compatible with wooden or Trackmaster track
$5.00 CAD