Car accessories

Hi I want to know the cost for shipping by air. First 4 set of 18 inch rims, then 1 front bumper kit, 1 rear bumper kit and finally side skirts. I want ship from Houston Texas USA to Karachi Pakistan. Please let me know. Or is there a simple way? Like carrying these items with me while I travel myself? Do I pack them in a separate box? Because these won't fit into a regular check luggage. Thanks.