I have several of these freight trucks that have the same issue. Apparently, they've been dropped and broken the coupler right at the shaft. I couldn't find a part number for either the truck or the coupler, but they're on stuff that was made around 2006. The second picture is why I need them, I have two of these that have the same break right at the shaft. If I could find just the coupler, that would be keen, but I'd also buy the truck if that's not available as a separate item.