Create a Modular Organic Blood Tunnel for Unreal/Godot (GLB)

I'm building a stylized 3D action game in Unreal/Godot and need a professional 3D artist to create ONE modular tunnel segment.

The tunnel represents the inside of a blood vessel/body and will be repeated endlessly in-game.

Requirements:
- Deliverable: .blend + .glb
- Game-ready topology (clean quads where practical)
- Low/medium poly (artist's recommendation)
- Rounded rectangular tunnel
- Flat floor
- Vertical walls that curve into a rounded ceiling
- Both ends MUST be identical so the tunnel tiles seamlessly end-to-end
- Hollow interior
- Approximately 20m long × 6m wide × 4m tall (can adjust if needed)
- Organic tissue look with veins, folds, fatty deposits, soft growths and glossy wet surfaces
- Stylized/cartoon realism (not horror)
- PBR textures included (Base Color, Normal, Roughness, AO if available)
- UV unwrapped

This is intended to be the first environment piece of a larger game. If we're happy with the work, there will be many more tunnel rooms, obstacles, decorations, enemies and environment assets.

Please include:
- Examples of modular environment work
- Game assets you've created
- Estimated turnaround
- Fixed price quote

I've attached concept/reference images showing the style I'm after.