There's a Niagara PH 40 on Yachtworld and the ad claims it to be from Hinterhoeler but it does look suspiciously similar to the Nautilus 40.
The Cabo Rico Northeaster is a very different boat. Not bad, great looking interior but a bit clumsy about the pilot house to my mind.
"Said Hamlet to Ophelia, I'll draw a sketch of thee.
What kind of pencil shall I use? 2B or not 2B?” Spike Milligan