Fastmarkets: Global Lithium Wrap.
Example: https://www.metalbulletin.com/Article/3945553/Lithium/GLOBAL-LITHIUM-WRAP-Chinese-carbonate-sellers-target-higher-prices-but-continue-to-face-resistance.html
Best I can tell, the publish a summary every week of the changes in the global lithium market. Just something for future reference.