Lost in the game

First of all, my apologies if the solution to my request has been already written.
(I used the forum search tool to no avail).

I haven't played SS since last october and now I'm replaying the game where I left but I cant remember where I am.
I updated the game this february and before I checked for new updates using the autoupdater.
I have ZEP25 and back then there's was no way to continue to ZEP26 and so on. I remember I could find a set of 3 ZEP docs somewhere but I cant exactly remember where.

If I'm not wrong ZEP 26 was in the undergorund lab in the Antennas area (Red Forest in vanilla version). The 3-ZEP document set was

Spoiler:

.
I visited both places but no documents there.

So.. any helping hand to find ZEP 26 - ... ?

You found [ZEP] 25

Spoiler:

I haven't been past this point yet, so I don't know if any more [ZEP]s have been added.

Oh, and welcome back!