Jim is correct; that is kind of a thin bushing.

I would always go to a local machinist; you will need one for many purposes.

I think you can use the theaded portion of the strut rod top; screw some oversize nuts on it and turn down the nuts in a lathe to the OD you need.

I actually do that for my car to fit the spherical bearing in the camber plate. The problem is that the machinist will need a floating centering chuck with the lathe.

I bought him the tool and he does my struts for free; ask around.

Cheers.