This app was mentioned in 19 comments, with an average of 1.05 upvotes
You might need a crm but take a look at Contacts + Pro and see if that meets your needs. Good luck!
https://play.google.com/store/apps/details?id=com.fullcontact.ledene
Contacts + Pro may or may not meet your needs
https://play.google.com/store/apps/details?id=com.fullcontact.ledene
Contacts + Pro allows you to add multiple photos to each contact.
https://play.google.com/store/apps/details?id=com.fullcontact.ledene
Google Contacts or contacts + pro
https://play.google.com/store/apps/details?id=com.fullcontact.ledene
I use and recommend Contacts Pro+
https://play.google.com/store/apps/details?id=com.fullcontact.ledene
Take a look at Contacts + Pro
https://play.google.com/store/apps/details?id=com.fullcontact.ledene
Try Contacts + Pro
https://play.google.com/store/apps/details?id=com.fullcontact.ledene
Contacts + Pro is what I use to sync multiple Google address books. https://play.google.com/store/apps/details?id=com.fullcontact.ledene
Can't you create a new account simply to share all contacts? Also, see if Contacts + Pro keys your needs. https://play.google.com/store/apps/details?id=com.fullcontact.ledene
I use contacts + Pro. It's not free
https://play.google.com/store/apps/details?id=com.fullcontact.ledene