I also researched the matrix announcements back to 2006 and have not been able to see anything about this.You can research old MRX announcements on the ASX website.
KAI Pilbara Minerals buys land off Kairos part of its York gold project for $20M – and a 2% royalty on any PLS gold sales
MND Albemarle lithium downsize burns $200M hole in Monadelphous's pocket as latter's contracts terminated