Ann: Acquisition of Mid-West Iron Ore and Port Assets, page-90

I hope this strikes you in good will and hope the below link can at least give you good guidance in your research with the time period you are looking up, please note the price is for 62% fe (not 58%) as a guide for the time period you were after in your post.

https://www.marketindex.com.au/iron-ore




Click the link and use excel to navigate the price point to the time period in the month or quarter you require.
when i was tracking it these price in the quarters matched Fex prices in their anns, remember its priced 62% CFR

I hope this assists you with your analysis.

Rooks

@mrposhman@malvernmoe