Yeah, I'm not making one from scratch, base or 3D printed figure.
And, part of what I'd want is...
Some form of removable limbs, to display detached while he's in the tank.
Imagine similar structure and detail worked into the Batman Armory as a comparison. Yet for Vader, instead of a suit hanging there it's his actual torso. (in an illuminated tank).
Surrounded by racks of detached elements of his armor, helmet, breathing apparatus, and mechanical limbs.
Would make a great display.
Again hopefully if this is somewhat revisited in the Obi-Wan series. They might give the full concept a second look.