I agree with Lisa. I don't think a mustache bar is going to make him happy -- it's not much less upright than drop bars, really, and your shifters might not work. An albatross bar will definitely require new shifters.

There are so many nice upright bikes out there now, mostly much less expensive than the Volpe. Even if you take a bit of a loss you will still save money, I think.

ETA: that Bike Forums thread is unintentionally hilarious ... "my wife loves her Volpe except she'd like for it to be a completely different bike!" If at the end of the day all you really love is the color, you need a different bike.