I recently went through a Titleist fitting, and while I have been playing a Mitsubishi graphite shaft in my irons, the Titleist rep recommended (and I hit much more consistently) a Nippon Zelos 7 steel shaft. This doesn't appear in the shaft options on the website, nor in the options book on the website. It is lightweight, but feels much less whippy than the graphite shafts I've been using.

Is this shaft approved and sold thru Titleist? It is an upcharge for this steel shaft, and will dealers have this as an option?

Thanks.