I don't know about Deere... but my CIH dealer lists some of the NLA things with a note that says they may be able to source from another location.  That being said, I tried that with a part last week and got an email in about half an hour saying that my account would not be charged as the part was not available at any source they had... so who knows if it ever works or not.  First time I've tried it.  I took it to mean NLA from CNH but that any one of their other network dealers may have some NOS laying on a shelf somewhere (although they usually show availability for other stores on the page (maybe not for NLA parts I guess?).  I doubt they called up an aftermarket or something to check but I could be surprised.  I'm sure if they could buy it for 50% and sell it to me at 300% they'd call a lot of places lol.