XCOM 2: SPARK models

Has anyone been able to extract the SPARK models from the Shen’s Last Gift dlc in XCOM2?

Normally I use UE Viewer to extract xcom models from the UPK archives,

but it looks like the UPK files for the DLC won’t load properly with UE viewer, and when I unpack the archive, all I get are texture.2d and staticmesh, which I’ve not been able to do anything with.

Any suggestions? Can someone try this?

Edit:

I’m aware that the weapons and BITS were extracted to source

So is it possible it could be done for the Sparks?