I don't suggest you spend your time looking for used bikes that came stock with them but...
I bought 2 Schwinn Circuits in the last year and both came with Concor Profils. 1 was like new, the other beat up but they are the best saddle I have ridden in my limited experience.

If you find a bike with the saddle buy it and part out the rest of the bike. I did and got a 2 free saddles and some cash left over.