It seems you want what I want, and I'm not sure they're made. I saw a thread with a vintage Falcon Special recently, which looked exactly right, but too small for me. Otherwise, it looked like a road-racing bike, same proportions, just with a step-through frame. My Jamis step-through is 39 lbs - not exactly light weight. My brother's Clem Smith Jr. step-through is only 32 lbs, but it's a foot longer than a normal bike. I think a drop-bar, lightweight step-through is a business opportunity.