I have not applied for a FID yet as this one excerpt is what kept me from thinking I need one:
13:54-1.3 Firearm identification card or permit to purchase required
(a) No person, other than a licensed or registered retail or wholesale dealer, shall receive, purchase or otherwise acquire
a rifle, shotgun or antique cannon, other than an antique rifle or shotgun, unless that person possesses and exhibits a valid
firearms purchaser identification card. No person shall sell, give, transfer, assign or otherwise dispose of a rifle, shotgun
or antique cannon to a person other than a licensed or registered retail or wholesale dealer unless the buyer or receiver
possesses and exhibits a valid firearms purchaser identification card. No person shall sell or acquire a sawed-off shotgun.
The guns I have in mind are pre-war 1898. Nothing specific as of yet. Searching gunbroker.com mostly which would include both in and out of state.