Jamesway Equipment manufactures a Three-point Hitch Mount Agitator and a Trailer Mount Agitator.
These are built with an 8'' x 8'' main beam, oil bearing seals, and a triple sealed oil chamber.
Phone CJ or Sid at 403-885-252.
For more information see Jamesway PTO Agitator
Propeller Agitator 3-point hitch model