I am tall with broad shoulders and I don't like narrow bars, but I like vintage bikes
The only Cinelli bend that was made wide was Campione del Mondo (model 66), it's biggest size was 42, hence 66-42.
66-42 from 1970s is rare, narrow trends of the time and the fact that many shops stocked the more popular Giro de Italia (mod 62) are adding to the rarness of wider bars. But think big, look at photos of Eddy Merckx - he knew what he was doing.

http://www.43bikes.com/cinelli-bars-stems.html

If you would like the more common Giro de Italia bend, you will have to go all the way to the mid 80s? or 90s to get it in wider than 40 cm.

A note. Cinelli model numbers vary over time.