I went to Kmart and saw that they appeared to sell MFI certified lightning to USB cables. I also checked the quality of the cable and it seemed to be consistent with this: https://support.apple.com/en-au/HT204566
I also tested using the cable to charge my iPhone 8 and it seemed to be in working order.
There seemed to be plenty of stock at the Kmart I went to, with all the cables being labelled as MFI certified.
Pretty sure this is their normal price.