The fact that you didn't appear to return to the thread is more relevant. If people knew the answer, I'm sure they'd be happy to help. As it is, it's a very random question that would take very specific people to answer.
As such, even though this is a large community, it might happen that nobody (who reads these forums) know your answer.
I'm sure that if you had actually returned to your original thread (wouldn't even have to be within a short timeframe, though it'd make your request more... 'valid', shall we say), you might not encounter what you perceive to be annoying comments.
Edit: Also, I don't know the answer. Finding alpha and beta versions of a game that didn't, to my knowledge, have any sort of beta for the public, will most likely be very hard.
You're better off trying to contact ID Software, or any person that has worked for them around the timeframe of that game.