--if you could post those test results, so we can discuss them.

It doesn't sound like you've had very comprehensive testing for neuropathy, though; most of the testing you've had so fatrseems to have focused on mechanical problems of your lower extremities, but as has been pointed out, the cause may be higher up (spine) or even systemic and just showing up first in the nerves farthest from the center of the body--many neuropathies have this "length-dependent die back" pattern of symptoms.

As always, I recommend the Liza Jane spreadsheets as a comprehensive listing of tests for possible neurological problems, as well as a good way to track test results over time:

www.lizajane.org

Unfortunately, foot symptoms can be similar whether the damage process is located right there, higher up, or systemically--it's why the search for causes is often a long (and expensive) one of exclusion.