I disagree with some of the comments above. I don't think it will bend without breaking, and most of us couldn't bend it anyway. I have a Diacro #3, and I'm pretty sure my bender would break first unless the walls of the post buckled or failed by being crushed.

I am a little surprised a zero setback post wouldn't work. Maybe in combination with a really short stem and something like a Brooks saddle that can be set really far forward. People get used to some really weird setups, but I just don't think moving the seat forward to combat short torsos and arms is a good solution.

As someone posted above, there are posts aimed at triathletes. Look for "set forward" posts. But my guess is that if Thompson doesn't have that size, nobody is going to have that size.