There is a Dormant SIVA Cluster to be found in Splicer's Den. They can be collected during Wrath of the Machine.

Dormant SIVA Cluster: Fallen 3.9[edit]

Head forward through the jumping puzzle to this part. You need to find this white panel. Turn to the left and then jump up onto the piping just above you.

Dormant SIVA Cluster Fallen 3.9

Look forward and jump onto the suspended platform above the regular path.

Dormant SIVA Cluster Fallen 3.9

Go to the end of the platform and jump up onto the vent that is just in front of you. The Dormant SIVA Cluster sits on it.

Dormant SIVA Cluster Fallen 3.9