Does anyone know if the original theater version of "Death and Rebirth" is available anywhere online?
I'm not talking about Death(True)² but the original first version that was only in theaters before it was released in the Japanese Blu-Ray BOX. I'd be really grateful to find it, as I'm curious as to how different it is from the other 2 later releases of it!

I can only name physical availables, but they might send you down the right rabbit hole:

The original theatrical version is in the JP BD Box (the original or the newly released one), and Death (True), a second of the three versions, was part of the JP Archives of Evangelion DVD release.