I saw a small folding step at Walmart a few months ago that might work. It wouldn't attach to the rails but it folds out to 2 stairs and looked compact enough to stash behind a seat or in the back without eating too much room.
My wife is also short and has to climb into the FJ. I was thinking of giving her some rope to get into it.
She currently drives a Hundai Elantra which my 6'4" self needs to be greased up to get in and out of. Suffice to say I don't ride very comfortably. She can climb a little.
Payback
