Nope, I did not end up with the zero offset seat post. I can't remember what they did, but it feels fine.
When we were riding home, I felt like riding by and showing the "other" LBS my new purchase, but it was really just a mean impulse. I might need them for something in the future.
However, I will be taking my Guru in to the new LBS and see if they can approximate the same geometry with bars on the Guru with a change of stem and position.