Sim-Lab's Pedal Inversion Kit - Faster, More Consistent : r/simracing
FAQ #98: Car seat adjustable inverted pedal mount
With this pedal mount, it is possible to invert your pedals and obtain a GT-style pedal travel position. Two 15 mm thick side brackets allow for an extremely rigid base.
Trak Racer Universal Inverted / Formula /GT Hybrid Pedal Bracket Syste – Trak Racer EU
Racewerk Rs and RS Pro inverted Hydraulic Pedal Set. Black - Digital-Motorsports.com