No. What's really needed is a variety of simple staircase configurations, that will show detail in 2D, and hopefully work in 3D as well. A lot of the staircases available on the 3D model page, do not show any detail in 2D, they just look like rectangles boxes, plus there are not enough configurations.Didn't you find what you're looking for among all the models and link in the 3D models import page?
Example of what I'm looking for:
