Dave, this issue is potentially correctable both with orthotics and/or corrective exercise. My preference is to start with corrective exercise (maybe because that's my area?!?), but I usually feel that if you start with orthotics that put your foot into proper alignment then your muscles may not see the need to be active and so your body will learn to become dependant on the orthotic.
Corrective exercise is hard to prescribe in this forum, mainly because I don't have a complete handle on exactly what is happening at your foot (I wouldn't call your ankle/foot 'typical'
), and when I am assessing this I usually do in a 3-dimensional setting, while also examing dynamic positions. Also, another thing I would look for is hindfoot position from behind, and single leg calf raise from behind. These would tell me what the static position of the hind foot bones are in, and how well tibialis posterior is working.
Did you check the APTA website for sports PTs in your area? Also, I really respect UConnJulie's input to these forum's. She may be able to give advice not only for the condition but for the best approach to finding a PT skilled in these areas.
Also, I can run your photos past the podiatrists at work if you want?