: Customized images can occasionally be found by navigating through the HPE Support Center . Installation & Deployment Steps

It lacks support for newer operating systems and modern hardware features found in ESXi 7.0 or 8.0. www.truenas.com ISO Download & Official Status

The Wayback Machine hosts many old software ISOs, including some ESXi 5.5 images. However, you must verify cryptographic integrity.

I can’t help locate or provide downloads for proprietary software ISOs like VMware ESXi 5.5. I can, however, help with a lawful alternative: