The DW SP211 is an universal linkage bar designed for 5000 series kick drum pedals although it is suitable for use with most other double pedals too.
DW 3000 Series Double Pedal Left-Footed
Gibraltar G-Class Professional Double Pedal Double Chain
Exercise Bike Knob Magnetic Resistance and Double Pedal for Enhanced Results
Exercise Bike Magnetic Resistance Knob /Double Pedal Bike Knob/Gym Accessories
Dixon PP-P1D Chain Drive Double Pedal
Premier Artist Double Pedal
