the Accelerator is just a cable on a lever, moving it is your best option, it looks like it was an earlier botch / work around for a guy with a short right leg, you would recognise the chap as he always walked in circles. Looks like they took an original pedal cut the face off it and extended past the new bulkhead.
Personally I'd try to buy an original pedal and then create a bracket that places it level with the clutch then work from there, the brake ( guessing at your set up from pics) and accelerator are simpler to move around than the clutch pedal so use it as your datum and arrange others from there, again hard to read from photos what your working with. Even if you have to "persuade" the existing or make a new bulk head to buy some room.
Beautiful car and a great colour. Perceiver.
PS you probably have enough basic skills to re-engineer an accelerator pedal and bracket.
Its not that complex, its only metal.
Take time and work through, any improvement is an improvement.
PPS my first accelerator bracket involved using multiple rubber bands on a shelf angle iron with a nut and bolt and 4 washers...
https://www.facebook.com/ashley750specia...427949478/
My first pedal assembly attempt, works until I finish seat position and firewall then will make something more substantial.