Recently heard that Arai drum will no longer be made; however there are still several places that have them in stock.
IF a 3rd brake is desired, the Arai would be a logical choice. Most folks leave the control of 3rd brake up to stoker. However, pilot or stoker can easily control it with a thumb or barcon shifter.
Likely the Taylor has canti brakes which are still a good choice. Updating brake pads could be another option.
Just our input.
Pedal on!
Rudh and Kay/zonatandem