I searched high and low for a standalone I badge in the Hemmings photo archives and I haven’t yet Intercepted one, so I turned to the Internet, where I spied the above brochure photo featuring an I badge just above the grille. My Britcar (and Italcar) friends will surely identify the little blighter. If you need some assistance, I found another badge from the same company on Flickr.
In the meantime, what standalone I badges can you think of?