tune speedneedle alcantara (alcantara = ultra suede).
Speedneedle should have the same level of comfort as a classic flite, I'm about to install a wider marathon version on my bike so I should have some personal input on this pretty soon. One problem might be the availabilty of Tune in the US.
You could also try a stripped Selle Italia SLR TT. Try to find one that has a damaged cover, then rip it all off. Same level of comfort.
Not sure about the stripped flite though, the shell looks a little less flexible then the SLR shell, but i could be wrong.