We've had this from the 1990s, but haven't used it much as it wasn't suited to my style of playing.
Yamaha FC7 Volume Pedal (NEW)
Yamaha FC7 | Heavy Duty Expression Pedal/Volume Pedal
Yamaha FC7 Heavy Duty Expression Pedal /Volume Pedal
Yamaha FC7 Volume/Expression Pedal, Heavy Duty, Good Condition, Works Well.
Yamaha FC7 Foot Controller Volume Expression Pedal Keyboard Japan
