Providing IPv4 Services in an IPv6 Backbone

Hi all, Have there been any gap closures on RFC7439? I am particularly interested in 4PE, 4VPE, and other MPLS enabled services like L3VPN, NG-MVPN, E-Line, E-LAN, and EVPN. Does Juniper have an "ipv4-tunneling" mpls keyword? Thanks, Jason