While the full set of current typically requires a purchase, you can legitimately access a significant portion of their prep material and other high-quality resources for free through official channels. Official Kaplan Schweser Free Resources
But what about curriculum changes? The overlap between CFA Level 1 from 2023 to 2024 is roughly 85–90%. You can use the old notes for most topics and then use the (available on their website) to patch the gaps. schweser cfa level 1 notes free