Yes, they did build a 58MY ED. The first one of these 58MYs I considered, Cardinal IV, was an ED.
As for that butt-ugly, aluminum, condo patio sliding door - yep, that's original. The absolute dumbest, stupidest, WTF brain fart Hatteras ever had. One day, I will shed mine in favor of a set of teak sliders like the '68 41C has. Every time I see that stupid aft deck door on one of these, I could just barf.