You mention lots of surgical and medical interventions for the symptoms but no mention of attempting to treat the cause except for the orthotics. Be gentle with it, but be consistent. It shouldn't hurt in your foot when you stretch your calf. DO NOT do the stretch where you drop your heel off a step. You don't mention any strength training exercises.
Strong hips make happy feet.
All orthotics are not created equal. Just because one set of orthotics wasn't effective doesn't mean that a different style or posting won't be. For example, softer orthotics do a fine job of cushioning, but not too good in the motion control department. Most folks with Morton's Neuroma pronate excessively in the late stance phase of gait and respond well to a firmer orthotic with some forefoot posting. You mention lots of surgical and medical interventions for the symptoms but no mention of attempting to treat the cause except for the orthotics.