As of March 9th 2015 the Buckfast trailers were merged into a Combo Pack with the truck skin.
As mentioned earlier, these are stand alone buckfast trailers that will be available in several company yards. (see company mods page for details.)
Hochtief is a German construction company that replaces Sanbuilders. The company mod also includes this stand alone trailer that will be pulled to/from Sanbuilders, Posped and Stokes.