Is there a way to get more prefabs in UEFN?

Hey, I want to build The Shark from Chapter 2 in my Fortnite map. However, I want to have it 1:1 as it was in the real game. I can’t build it exactly like that because there were too many differences. Unfortunately, this is not available as a prefab in UEFN. Therefore the question if there is another way to add prefabs to the game externally?