My p2 aero post doesn't fit in my work stand clamp. There looks like there are 2 adapters available for aero post, but neither are specifically for Cervelo.
Does anyone have any experience with these? Or do you know of any other adapters?

This one is made by trek

http://www.trekbicyclesuperstore.com/...JEAQYASABEgIKePD_BwE

This one by Giant.

http://www.treefortbikes.com/...zEAQYAiABEgJYOvD_BwE