I was hoping that a local supplier (i.e. a fish shop that used these on their own tanks) could help or maybe had spares from broken units etc...
It's going to be quite expensive to get the parts over from China, and at $80 USD (R1,300!) before the courier costs you have to ask whether it's worth it!
Please let me know if you had any luck on your side, as I would rather repair my unit than use it as an ornament!
Cheers.