I got this one today! An Alto C TNG Double ocarina by STL (I thing I got it right, I don't know for what the"TNG" stands for). It sounds very nice and
Double Ocarina of Time Alto C - Songbird Ocarina
Thomann AC Double Ocarina Regular – Thomann Italia
Ocarina a tripla camera classica in tinta unita Strumento per ocarina – Pures Music ™
Thomann AC Double Ocarina Regular – Thomann Italia
This double ocarina is a triple ocarina (kinda) - STL Max Range Double Review - YouTube
Double Ocarina of Time Alto C - Songbird Ocarina
Amazon.com: 12 Hole Plastic Zelda Ocarina,12 Hole Alto C Ocarina,Replica Zelda Ocarina,Unbreakable Plastic Ocarina by OcarinaWind® : Musical Instruments
New Double Ocarina with Maximized Range – STL Ocarina
Amazon.com - Handmade Ocarina Easy to Learn Double Ocarina Alto C Double (2) Sound Holes 2 Octave Masterpiece Handmade Ceramic Professional Instrument Gift idea
Night By Noble - Ocarina in plastica con finitura in gomma nera : Amazon.it: Strumenti Musicali
Linbeck's Theme on STL Plastic Zelda Double Ocarina - YouTube
New Double Ocarina "Water" – STL Ocarina
New MaxRange Triple Bass Ocarina – STL Ocarina
My three ocarinas and their pros and cons (in my opinion. Posting this for anyone looking for ocarinas) : r/Ocarina
Double Ocarinas | OcarinaKing | European Dealer of Quality Ocarinas
New Zelda Double Ocarina with Range of Two Octaves – STL Ocarina