I've seen a tech map where you start at a portal and there are various portals in different states of assembly if that's what you're looking for.
That one seems to be pretty popular in MA.
There are three or four Portal Corp maps that are probably what you're looking for. I think they're under Unique then Tech (maybe Unique then Unique again).
I'm fairly certain I've seen a tech lab map that has a room with a portal at the end. Does anyone know if this map is available in the MA?
Issue 16 made me feel like this.
Warning: This poster likes to play Devil's Advocate.