Cuore AC Switch/Controller Problem


My girlfriend is in the Caribbean Islands away at school and owns a 2002 or 2003 Daihatsu Cuore (I believe? It's a 2002-2003 Daihatsu and from the images I've seen online looks like a Cuore. Her heating knob (the knob that controls the heat, defroster, air conditioner) and knob that controls the low, medium, high of it no longer work. Basically it does not catch on the grip so when you turn it, nothing happens. A wrench is required to adjust it.

I was wondering if anyone know how to fix this, or where I might be able to find a replacement part. I am from the USA, but would really like to try to get this if it exists anywhere.

Kind Regards,
Michael Sharphouse