[Serious] Origin of lost(?) publication regarding the 1957 Vilas-Boas abduction

Hello everyone. I have had the front cover of this publication in my files for a long while now, and I have been looking around trying to find the origin of the full comic. Has anyone ever seen this cover before or the name of this publication, or remember reading it somewhere? Since the AFU Shop where its being sold lists it as out of stock, and there's little mentions of it online besides an Excel spreadsheet, and a name drop in a now-inactive blog

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