Hey David!
Wow! This is a tough one no doubt!
Everything you have written above is great to try. Hope that is going well.
Other thoughts:
Psoas (3″ needle)
Mid rectus femoris (fascial point 3″ needle)
Common peroneal nerve (2 fingers distal and 2 fingers anterior from fibular head. may be tender to palpate. 2″ needle)
Saphenous nerve (about 3-4 fingers down from tibial platuea. Might be tender. 2″ needle)
Deep peroneal nerve (between 1st and 2nd metatarsals. 1/2″ needle)
Anterior talocrual joint (3-5 1/2″ needles along the joint line)
See if that helps!! Keep me/us posted!!
Sue