Another option would be to put an access point at the remote site to terminate the bridge link, and then plug that into the WAN port of an MX64. You would use an MX65 as well which gains you a pair of PoE ports - perfect for phones.
Then create a VoIP and Data VLAN on the MX. These would be routed subnets - not bridged. The other benefit is you could then apply bandwidth policies and QoS to the data before it goes across the WiFi link.