Seeing as a couple of people seem to be wanting to do this and don't know how, I thought I'd do a writeup based on what I did
To do this, you will need to find two JDM folding mirrors, and their controller from the centre console. You'll also need some wire, and I'd recommend having a selection of crimp spade connectors (use insulated receptacles, or wrap in self-am*** to insulate) nearby for the joints so you can remove or alter the wiring later.
The first problem you'll come across is that the existing socket and loom for the mirror controller is missing the necessary pins, which are actually little female recepticles crimped onto wire, because Nissan only populate the holes that are actually used. Damn this cost saving. No matter though, because with a little bit of jiggery-pokery you can extract spare pins from another socket. The pins seem to be the same across all the sockets, but to be on the safe side I chopped the socket and a few inches of wire (to connect to) out of a car that was being broken.
The pins themselves can be extracted from the spare socket with a little bit of force, persuasion, or just plain hacking up the socket (don't damage the pins). You'll need to keep it's captive wire attached so that you have something to connect your wiring to. You need two of them since the controller applies voltage with one polarity to extend them, and swaps it to retract. Attach spade receptacles to these for later.
Now you'll have to fit the mirrors themselves, you'll have noticed by now that there is an entire extra plug. If you're lucky you will have it's friend to plug into it to keep it all neat, if not, it doesn't really matter, just splice into the wires on the extra plug and crimp spade connectors on them.
To fit the mirrors you will need to remove the door card and a small section of the plastic cover with it's goopy adhesive, and pull off the black plastic cover on the inside where the mirrors are. Behind there you will find three screws which will release the mirrors, and you will also need to remove the fixing for it's wiring. The JDM mirrors just pop straight back on. Plug the pan/tilt connector into the existing one, secure the wires, and leave your new spade connectors dangling for the time being, but don't let them touch the adhesive, it's icky stuff and virtually impossible to get it off something it's stuck to.
Now comes the fun bit.
Remove the surround around the heating controller and headunit, this will enable you to remove the centre console itself because it will reveal two screws holding it down. There are a further pair of screws on each side. Run a pair of wires down the centre console, make a T junction in the middle, and run them under the dash to the tubes that carry wires to the doors. Push the wires through the tubes (this sounds easier than it is ) and route them to the extra pair of wires in the door. Attach a pair of spade receptacles and plug them into the mirrors. Make sure you get them the same way around, or your mirrors will dance instead of opening and retracting
Now go back to the centre console, neaten the wire runs up, cut them to length and attach spade connectors to the ends of them. Remove the old mirror controller, and replace it with the JDM one.
Now it's time to turn your attention to the socket. You will need to insert the two extra pins from the wire side into the holes shown in the picture below. I have marked them with red arrows, and the empty ways with black dots to show where they are.
For those who'd prefer, here's a wiring diagram instead:
Almost there!
Plug your wiring into the receptacles on your two new wires, and check all the connections elsewhere are secure, and there are no shorts.
Turn the ignition on and see if it works You may need to swap over one or more connections to make sure the mirror position matches the switch and each other.
Assuming it all works, put your car back together. If it doesn't, ask me