Both the Iroquois class and the Halifax class have 510s in various configurations.
The Iroquois class has a hull-mounted 510 and VDS 510 (at least the TRUMPed ones do). The Halifax class has the hull-mounted 510 - I think that since they have the CANTASS, there is no room for a VDS 510.
The 510s seem to be doing well (correct me if I'm wrong), so maybe that's why no replacement as of yet.
The Iroquois class has a hull-mounted 510 and VDS 510 (at least the TRUMPed ones do). The Halifax class has the hull-mounted 510 - I think that since they have the CANTASS, there is no room for a VDS 510.
The 510s seem to be doing well (correct me if I'm wrong), so maybe that's why no replacement as of yet.