Interesting - A few months ago Nikon released that it would no longer send parts to Non-partner repair places to keep quality of service up but most have said they haven't seen that happen. Maybe Nikon has stopped sending parts to them. My experience is that most repair shops can be a double edge sword as they may want to sell you a lens that they want to move. There is also a bunch of very uninformed people who work at them as well and allow their own opinions pass for company policy. There is still a large group of people who hate "G" lenses and tell people to go for older glass.
If you send Nikon a note to their service contact on their site, they will tell you if the lens is still supported. Many of the older AFD lenses (Screw drives) are starting to no longer have parts made for them. Not sure if that includes the exotic lenses yet or not. Nikon is actually really good at getting back to you and are great to work with.
I would think your best bet is to go with the newer - not Older version.