Quite possibly.
I've seen a few of these corner sections arrive on pallets when front end repairs are carried out (one as recent as a few weeks ago for a 185!) and they're consistent with the drawings that I've studied.
I could even debunk it a little further and say that the windscreen portal on a non-gangway unit forms one open portal between all three sections (two corners & one centre as can be traced in the photo), whereas (IIRC from the 350403 v horses incident), a gangway unit has individual 'closed' windscreen portals in each corner section. So I doubt it would even be possible to simply 'chop' the gangway out without changing the entire front end.