Thanks for the comments, sorry I didn’t get back here sooner.
Chupacabra is scratchbiuld from sheet styrene. The back story is that is was a pre- event APC converted from parts at military depos possessed by the confederation as a scout vehicle.
The shape of it was probably most inspired by Humber armored cars of WW2 more than anything else.
As far as to what is in the box, I’m hoping that we find out soon.