Thanks for posting this rare doujinshi on nadia. I confirm that is Nadia.
In the first story Nadia is 15 years old (as in the original series), in the second story Nadia is about 18 years old (as in the movie) and in the third story Nadia should be 30 years old.
I hope you find something on the first 6 pages of the gallery that you posted 13 years ago https://e-hentai.org/g/141138/912fe512f4/ . The author should always be Izumiya, and should be 6 pages of another story about Nadia and Jean, set on the Island. Unfortunately, it seems impossible to find on the internet...
or any other new doujinshi about nadia is always welcome :-D Thanks again