The "fog light" bulbs are H11.
Not quite sure what you mean by "Plug"
Ebay can fix you right up - Plug- N - Play
This has been done many many many times, in fact most owners who start down this path replace "everything" with LED's.
Extensive discussion here:
http://www.mynissanleaf.com/viewtopic.php?f=37&t=2773" onclick="window.open(this.href);return false;
and a great reference to what all the bulb sizes are (check your model year agrees)
I have done everything except front turn signals.