1) The '13 base sport will require another left stub shaft (38220-1NC1B)...see my linked posted---->
checklist of bldg a rear diff
-*note* number 7 on that list is specific to CAP YanX since his sensors were missing!
2) I'm assuming you have low miles on your '13 model, probably just need the following Nissan parts: 43262-01P1A drive pinion lock nut, 38189-P0117 pinion front oil seal, 38165-0C020 collapsible spacer, 38342-P9010x2 seal-oil, diff side, (pinion height adjusting washer, side bearing adjusting washers--->all of these parts are variable and a professional rear end builder will know what spec'd part to order)
3) I bought mine from Titan Motorsports in '10 for ~$1.4k. I would check THM motorsports price cuz they seem to beat Titan at present!
X) Don't forget to upgrade the final drive gear while you got the diff out. It would be a sorry waste to upgrade the LSD and not go to a lower final drive.
P.S. The OSG LSD is loud too. You will hear a loud *BANG/POP* when it unlox. Not as bad as the Nismo LSD though from my limited Xperience hearing/seeing the Nismo LSD.