I concur, the Heinkel would be huge in 1/35-32. I think there might be one of these in resin, but you'd be talking a whole lot of money for the kit and then to essentially wreck it. In 1/72, there have been at least a couple Heinkels and given it's crached, the old Airfix might even do, though the large greenhouse canopy would be a major challenge to replicate withthe glazing smashed.
As you may have noticed, the armored vehicles appear to be Nashorn or Hornisse, German SP guns with ersatz US stars.
Good luck withthe project and keep us posted.