If you’d like, I can provide a direct link to the Internet Archive copy of version 1.76 (the .img file) and step-by-step instructions for creating a bootable USB or floppy.
The Internet Archive hosts a verified image:
This tool is used to rewrite system board serial numbers and UUIDs. It is not publicly distributed by Lenovo for end users because misuse can permanently damage system board data. Authorized service centers receive it via the Lenovo Partner Portal.