1) Extra wide (eg skateboarding shoes)
2) Firm shoe base that cannot be twisted
3) Has a good rock (press the front down and the back lifts up)
4) Has an insole that can be removed
Found such a pair at New Balance, although Luke was not interested in the shoes.
Got him to wear his new shoes in the morning to work, and then in the afternoon fetched him from workplace to see Dr Lucy. She patiently work with him to fit in a new sole in the left shoe that can compensate for his lifted heel. Luke was very good and coorperated with Dr Lucy.
It is finally done. New sole added to the left shoe. Will see Dr Lucy in 1.5 months' time.
Thank God Luke is now on track to better walking!