If you are referring to the trunk that fits into the trailer hitch, that would be a Pakit Rak. Pakit Rak offers a mounting plate that goes under the license plate if you don't have a trailer hitch. It is NOT STRONG ENOUGH to be used as a trailer hitch though !!!
The top trunk was off of fleabay with lighting, mounting and stiffening mods done to it. Note the aftermarket HD knockoffs are not as well constructed as the HD OEM tour packs. This one took work to be usable and the top rack was rusted junk, thus tossed in the trash. His price has come down $50, used to list them for $450 on fleabay. The newer 2017+ trunks look nicer, but there are no aftermarket lighting kits for the 2017+ knock offs.