Some universities and research institutions have site licenses for software, including LISREL. Check with your institution's library or IT department to see if such access is available.
buy a "LISREL 9 key" from eBay, Reddit, or unknown sellers – these are almost always stolen or invalid.
One 2021 analysis by RiskIQ found that "lisrel 9 free download" search results had a 43% probability of leading to malicious sites.