The one you list there has the diode already on it, its just a matter of soldering it in(Watch the polarity!). dont worry that it has only 2 legs,as 2 pads on the one side are connected.I don't particularly like when they solder the diode making the assembly sit tall like that so i tend to solder the diode so it sits lower,using some hot glue under the coil cell holder. The one you list should work fine.
Mech