I too work at a Nissan/Dodge/Hyundai/Pontiac/GMC/Jeep Dealership, and I have asked for some JDM parts. I gave the parts guy some part number from
http://www.mynismo.com and he said the numbers were not good. So he went to the site and I showed him what I needed. He called Nissan Parts Warehouse and they said no such parts are stocked in the U.S. "duh" If I really want them I would have to have them ordered from japan, pay several dollars for shipping and wait several weeks to get my part. The parts guy told me its not worth it and just buy it online.