This may be too late, but I just uploaded 3 trophies. They don't fully match your specs, but it was all I could find over at Sketchfab (where I get all the items I upload)

Great but for the minute I just needed the Crimson Skull as I was doing a Cultist Lair of 'The Crimson Skull Cult' in my game.

What I'm looking for now are wall trophies for my Grunewald Lodge project. The Adventure calls for a wall trophy of the head of a Forest Goblin Chieftain wearing a sort of feathered headdress (Some sort of native american style I think) and several beastman wall trophies.

I've searched the workshop but came up empty.

You're welcome :) And just so you know, in the Workshop, there is a Collection of skulls.

Great Just what was looking for thank you.