You can get them on amazon too, You need to be sure to order the right one for the right range of years though. I think if you take yours out you will be able to see if the housing for the de-tent and the electronics is black or white. Neither the connector or the slot the stalk assembly fits into are compatible between earlier and later 2nd gens.

(this is the one I ordered, it also has some other switch built into the fog light talk, but it still works for on my 2011) https://www.amazon.com/gp/product/B0742GV3BM/ref=oh_aui_search_asin_title?ie=UTF8&psc=1

this, like the fog lights I linked are Chinese 3rd party reproductions. There was a guy that advertised in this subreddit a week or two ago that pulls the whole oem set off junkyard xterras for a similar price if that is more your thing.