i'm sure you could get them from your neighbor hood friendly nissan dealership. But i'm sure they'll cost you a pretty penny. I paid 16 bucks for a replacement door trigger . Uhhh... i know when i got some speakers installed at soundtrack they used replacement ones. Have you checked Checker or Auto Zone or Parts America? I bet you they have them.
not to many people like doing it but what the hell someone has to... go junkin, call your neighborhood junkyard that's where i got all my replacemnet screws and fasteners... they really are a dime a dozen at the junk yard.