Business ISO includes both Pro and Enterprise versions. On the same website you can find activation tools including HWID that will give you a valid digital license for your hardware that will survive a reinstallation of windows.
Just as a note if you’ve any Windows 10 Pro machines around you can upgrade them to Enterprise by just changing the key to a generic one under settings. A clean install of Enterprise would be better but you can still do it that way if you don’t want the trouble / spend more time with it.