You can get the script to export the value from a computer here.

The main thing the script does is call WMI to get the DeviceHardwareData value.  It’s a real shame that you can’t generate this data yourself.  In Microsoft’s own words:

References:

• Gathering Windows AutoPilot hardware details from existing machines
• Use the step-by-step guide to add Autopilot devices and profile
• DevDetail CSP
• Adding devices to Windows Autopilot