The standard Selle Italias were raced by a lot of people (under a bunch of different labels. I raced the Avocet III starting in 1976. (Ergal rails for a little more comfort on New England roads.) I had/still have a broken tailbone. Tried the turbo and the curled up tail was torture.
If you want basically that seat (pre Turbo) but modern day comfort, try a Terry Fly. Very little difference save the cutout (and the light ones use a stronger titanium rail). Made in Italy. I was told years ago by Sella Italia and have no reason to doubt it. Very, very well made seats.