You can create another local Content Library and use PowerCLI cmdlet "Copy-ContentLibraryItem" in order to copy items.
For example:
$item = Get-ContentLibraryItem -Name 'CentOS-7-x86_64-Minimal-1908' -ContentLibrary 'FirtstContentLibrary'
$library = Get-ContentLibrary -Name 'SecondContentLibray' -Local
Copy-ContentLibraryItem -ContentLibraryItem $item -Destination $library