This Pedal is currently available.
Expanded foot controller for Boss Katana
The GA-FC EX provides expanded foot control functionality for select BOSS amplifier models. It maintains the simple setup and intuitive workflow of the standard GA-FC while offering additional functions for greater performance flexibility.
Standard Features
Expanded GA-FC with enhanced functionality for select BOSS amplifiers
Rugged metal chassis and six heavy-duty footswitches
Control channel selection, effect on/off, and more
Two-color LEDs for easy view of control status
Two dedicated expression pedal jacks
Additional control jack with three-way mode selector
EXPAND mode for adding another GA-FC EX or a GA-FC
FOOT CONTROL 2 mode for operating two amps at once
EXP PEDAL 3 mode for a third expression pedal
Works as a standard GA-FC controller with other amplifier models
Connects with a single 1/4-inch TRS cable (included)—no power required
More Power and Flexibility
The GA-FC EX builds on the standard GA-FC with several enhanced features. Status LEDs with two colors make it easier to see changes when switching. And along with two dedicated expression pedal jacks, there’s an additional control jack with a three-way mode selector. It allows you to connect a third expression pedal or use the GA-FC EX for expanded applications.
These merchants probably sell this module. Huh?