Have a look at the attached and making sure you are referring to part 69 125Z (69 125 is the RH, 69 125Z is LH)?
Fiesta Mirror To 714.pdf
The part number is 8A61 17K747 BEXUAA, about $20 but need to be primed and painted to suit. I see you are in Fairfield NSW, if so Peter Warren Warwick Farm, Thomson Ford Parramatta and Cumberland Ford Blacktown are all showing stock.
Cheers and hope this helps...