There aren't too many saddles more T-shaped than Spec'.
Brooks and Selle-Anatomica tensioned leather saddles are a possibility. Wallingford Bike has a very generous trial policy on Brooks saddles, if you think you might want to try one.
The saddle I've been coveting but have never seen IRL to verify that it's truly more T-shaped than my Jett is the Selle Italia Turbomatic.
I'm not exactly sure of what you're describing though, specifically the part about scooting back.
Speed comes from what you put behind you. - Judi Ketteler