Pedal Extensions?

This whole thing sounds like there are no easy, cheap and non permanent fixes.
The conversions like the dwarves/midgets have adapted to cars would probably work but there is no way that those parts are cheap to get.
Those people really have it rough, it is a tall person's world.
Blocks on the pedals are the cheapest way but there will probably be a few trial and error designs to test before you find something that works.