grabbing username and password hashes from /etc/security/passwd

I have a list of usernames which i need to sync their passwords over to a new server. How would I go about extracting the username and password hash from the /etc/security/passwd file into the below format

username:MGURSj.F056Dj

The passwd file is in stanza format

username:
  password = MGURSj.F056Dj
  lastupdate = 623078865