I have a Tri Bike I am selling. Sounds like it meets your specs! It is a medium frame (54cm). 3 years old. It is all black and aerodynamic design. It is built by Parlee which is located in Boston (it has outperformed Cervelo in testing). It is high quality, carbon frame, durable. The cockpit is very adjustable for fit.
The only reason I am selling is because I decided to give myself a present this year on a very high end bike. Last year I was placing at most of my races for my age group with this Parlee. I have all the info on the bike and photos.
Just send me an email email@example.com. I am available this weekend for a test ride!