Have a look at an electronic system enabling a left accelerator pedal to be added.
Left Foot Accelerator Gas Pedal Portable LFGP Drive Assist for Handicap Disabled
Riverside County, California
Left Foot Accelerator - Capital Special Vehicles
Mobility Engineering - Left Foot Accelerators
Left foot Accelerator by Gilani Engineering NDIS registered
Electric Left Foot Accelerator - Des Gosling Mobility
Portable Left Foot Accelerator Gas Pedal LFGP Drive Assist for Handicap Disabled Injured Stroke Drivers - AliExpress
Foot Controls Advanced Wheels
Foot Controls for Cars & Wheelchair Vans
Drive by Left Foot: Designed for the drivers who have lost control of right foot or leg. Drivers control the accelerator pedal by left foot through a pedal installed to the left of the brake pedal. Universal: Fully adjustable pedals/actuator, can be installed in most vehicles and convert to Left Foot Accelerator. Only for vehicles with automatic transmission. Requires flat floor and at least 11 inches space between left foot rest and gas pedal. So it is not applicable on some vehicles.
Drifeez Left Foot Accelerator Gas Pedal Universal Portable Lfgp
♿ Left Foot Accelerators (LFAs)
Quick Release Left Foot Accelerator - Alfred Bekker Wheelchair and Mobility Vehicles
Left Foot Accelerator - ELAP
Left Foot Accelerator Pedal