I found this tutorial on YouTube of a guy doing it on his EVALIA which is another name the NV200 goes by
in some parts of the world, looks easy enough, no need to remove the glovebox like on most cars/vans.
He shows up a box with a Nissan part number too: B7200-21920
A quick ebay UK search brings up a couple of results.
I saw this video on youtube as well but my US NV200 doesn’t have a pull out filter like that. The cover seems to be fixed at the inlet. I’m guessing some optional parts can be installed to allow a cabin filter to be used...