Well, I'm not sure about hybrids, but some OEM irons have taper tip shafts.

That said, your hosel is probably .370" (so you're looking for an iron shaft), and probably taper. So, if it IS in fact tapered, that will seriously narrow your search (as there aren't that many tapered tip shafts).

You may want to contact the parent company, and get your hosel specs (Inside Diameter [ID], and whether it's taper or parallel).