I understand the need. However consider that older versions of both Workstation and their supported host operating systems may have security vulnerabilities that have not been patched.
You're running these old versions at your own risk. It's not out of the realm of possibility that VMware could remove downloads for versions of their products that are unsupported and contain unpatched vulnerabilities. I've seen other vendors do that to protect both themselves from liability and their customers from becoming malware targets.