Here’s two shots of the Ho VI at the Udvar-Hazy center of the NASM.

You can see the Ho III (barely) in the top left of one of the pictures.

There is also a Ho III fuselage down on the floor beside the Fw 190 (in a jig).

The Ho VI is my personal favorite Horten, and I don’t understand how anyone could fit in such a small cockpit.