Use the "INVOKE" command and click on the relay you have already placed - you can then place the other parts. You can type INVOKE, select it from the EDIT menu or use the icon on the left hand side. The same command is used for getting the power pins or other opamps from a multiple opamp symbol.
There are no alternatives for that device so either use another one or edit the library. If you select CHANGE then PACKAGE and click on the device you will see if there are alternative packages available in the library - there aren't.