What you really should do is consolidate them all into Fastmail, which is a service that obeys standards (CardDAV) and is much more reliable than iCloud can ever hope to be.
My contacts and calendar are much too important to trust to iCloud. When I abandoned iCloud, I used BusyContacts and migrated everything over (and cleaned up all the junk too) in a couple hours. I configured both contacts sources and then could drag-and-drop as I liked between them.