That's made me think.
I assumed that 'back into' meant further away from the driver, as it suggests moving it into the footwell, not out of it into the car.
But of course, it could mean out, towards the driver. That is actually easier.
If the pedal needs bringing towards the driver, and/or downwards towards the floor, my earlier advice to consult a disabled control specialist stands. One of the regular control mods is to fit a pedal extension, and there are various choices. These include blocks to extend the pedal towards the driver, or extensions to put it closer to the floor.
Could break out the 1970s platform shoes, and wear on the right foot only?