NOS Repro is a valid term not here per se but it can be here are some examples.
Guy A has NOS Star Wars side art, sends them off to be scanned etc. The side art is then printed on the same material using a NOS scan. That is a NOS repro as it is a repro of a NOS item, and repro'd as the same.
An example of NOT NOS repro:
Guy B has a PlayChoice 10 CPO he sends it off it gets scanned, the scanner makes a copy of it on a different material as the prior material is no longer available. This is a repro, NOT a NOS repro.
So the term can be applicable, when the repro is done using a NOS item and reproduced exactly the same and in the spirit of the original.
Example 3 guy C get CPO scans in and takes pre-orders, never ships anything makes excuses, this is NOT NOS, NOT NOS Repro, and NOT repro, it is RAM controls

sorry I couldn't resist.
a NOS repro is the higest form of a repro, as it is intended to be a replica. This is not NOS repro, it is just repro, I don't think there was deception here, just some "selling". It is like the people that list Ms Pacman as "vintage, and rare", them be words those thar arcade nerds like ya know.
Just like on craigslist. If you put @@**<<RARE>>**@@ in the description it ups the value but 15%, adding the word Vintage (and spelling it correctly) adds another 90% to an items value.