I've never heard that the Swaybar for JDM models changed and don't see any reason to think it did based on speculation. The JDM REAR swaybar is 1mm larger but there has never been any discussion about a larger front swaybar.

The 97-01 USDM ITR FRONT Swaybar is 0.94" according to the brochure which is 24mm (Actually slightly less)