I’ve been digging for quite a while for this model, Silver Lan originally ported it for his Gmod Aftermath gamemode, as can be seen here:
but he took down his SVN, making it impossible to acquire.
at most however, I found 2 models in XPS format, linked below
although I’m wondering if it’d be worth the effort to port and rig a model as large and complicated as this. If it can’t be done, that’s understandable, but i’d be very grateful if it could.