There is already an active thread about this topic, let's continue this over there: http://www.gamesas.com/index.php?/topic/1109752-bethesda-please-make-fallout-1-2-for-poll/
Also Interplay remains the publishers of the original games and therefore would be in charge of such a move. They'd probably need Bethesda's permission but ultimately they're the people you'd need to ask.