Please search for folder 'Tabletop Simulator' somewhere in your Documents (maybe Documents/My Games/Tabletop Simulator). There is 'DLC' folder inside. I have a Scythe DLC and it consists of files:
httpcloud3steamusercontentcomugc817877202145486855025D9A63C7A675BB66D7499DBF3AA860CA23D4C2.json - description
httpcloud3steamusercontentcomugc8178772021454880564345834A071D34F11667DA8236EEB9A89165262E.unity3d - assets
You can only look into *.json for 'Warfighter'. If you have many *.unity3d there is no easy way to distinguish... Then compress json and unity3d files and upload to some file sharing site. I'll look what could be done with those.