These are great and priced fairly.
High-quality BKM-129X compatible clone card for Sony PVM & BVM monitors. Features: Connect the card to your BKM-129x compatible monitor to enable your monitor to display the highest video quality through RGB/YPbPr inputs. BNC version - Includes switches to choose between 75 Ohm Termination or Passthrough (allows for the signal to pass through to another monitor).