Jim,
Among your many great points, the one that hits home is that you've only found ONE great sounding 77. I'm curious to know how AEA's replication stands up to see if it is really worth trying to track down the "real thing" (understanding that once I found one I'd probably have to send it to Wes Dooley anyway).
I guess my original post is a bit confusing and ignorant on my part... of course the AEA R44 is not a replication of the RCA 77... but it seems to be the closest, readily-available mic.
Rob