Install nodes behind firewalls

I have a system behind a set of firewalls that block inbound and outbound traffic; specific endpoints and ports will be opened later. Right now flows can be cut and pasted into my new environment. Is there a similar way to grab specific nodes and add them to the palette in my new environment? Specifically, MSSQL, Base64, jwt and token nodes to start

You can (on a different computer) download the tgz packages from npm & install them manually via the upload package button in the node-red palette manager

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Cool!!! Thanks a lot