If the reach on a 53 cm is too long for you, the reach on a 56 cm will be even longer.

There is a WSD steel Bianchi. I think it's the Bianchi Eros Donna. One of the Bianchistes will post some links, I'm sure.

Women have longer femurs than men. That's one of the reasons why WSD is so popular. I'm man-sized enough (5'8" long arms and legs) that I'm comfortable on regular bikes with slack geometry.

Reaching the levers: MimiTabby has a great bar on her Veloce, I think it's called the Eva. Her brake levers are so much closer now!

Frames and components you like: you could look into a custom steel frame and just transfer all the goodies from your Bianchi to your new steel frame. Then sell the Bianchi frame.