They have arrived.
I took some quick pictures but if anyone would like some specific pictures please feel free to let me know.
The Mythosaur skull is faintly present, I can see the outline of the eyes/teeth/horns in different lighting but my camera couldn't capture it. The sizing compared to a FP Hero shoulder is similar, with the FP being a slightly bit larger.
They're now currently in a display case. The molding process will begin shortly.