VintageConnections also has some of the tools that make it easy to extract pins and sockets. Others are available for diferent connectors. Google as needed.If you mean removing the terminals from the connector housings, it's usually fairly easy. Each terminal has a tab that holds it in place in the connector. One-by-one, use a precision screwdriver to push the tab down while tugging gently on the wire from the other side.
You can probably get new pins and connectors from Sparck.