Since this has been revived......
Azor makes a steel step-through frame although I'm not sure how you would go about getting just the frame in the states. I went with a total build from them but opted for an aluminum frame. Still should be super strong, and last forever.
8 speed IGH, roller brakes, heavy duty racks, hub dynamo, front stabiliser, dual leg kickstand, etc. A lot in the states will call it a women's bike but I don't care. Step-trough just makes sense.
So, they offer this same design in steel also as mentioned above.