I would recommend you consult your doctor/rehab therapist for suggestions on what type of running shoe would be best. You should also find out if your feet overpronate, underpronate, or if they pronate normally. Do you have normal, high, or flat arches? What surfaces will you be running on and would it be most beneficial to have a soft cushion shoe or a firm shoe?
Once you determine the type of running shoe that will fit your needs and situation then picking a shoe will often be much more successful.
Yes, for La Sportiva the size 47 converts to a US size 13.