Walter Melon lost comics

You may know Walter Melon as this character in a TV cartoon serie aired during the 90's. But originally, Walter Melon (Achille Talon in the original version) is the main character of french comic-book serie (which the serie is more or less adapted from, even if they only use the characters in it, and not the stories). In the serie, Walter Melon is never shown as a "hero-for-hire": he is clearly presented as acting as a comic character, it is even a running gag in the comics that the character breaks the fourth wall and tells the reader that he lives in a comic books universe. He was created during the 60's by Michel Greg, and had even his own magazine from 1975 to 1976. Also, while his first albums features mainly one or two pages gag, he also had 48 pages adventures. And, before his death in 1999, Michel Greg started on of these, entitled L'Île Aytaytt-Hunnfoa (The Oness-hup-Honat-Ime island), in which Walter involunteerely inherits and island in South Pacific. Sadly, he only did the 10 first pages, and the authors that continued the serie never finished it. 4 pages were published in black and white in the comic book Achille Talon: Le Maître est Talon. Also, it seems that a pirate edition existed around 1993, as it had been able to be bought on Amazon.uk at one point (http://www.amazon.fr/Lîle-Aytaytt-Hunnfoa-Greg/dp/2205040472), but we don't know lots of things about this one.