I went to the Kubota website and clicked on "Build My Kubota" for the LX2620.
The models that came up were LX2950 and B2779 as options. You'll also need the 4 point hitch and subframe LX2940B if you don't already have it. Not sure if that kit also incudes the mid PTO shaft.
Over $8K total for the sweeper and sub-frame.
