This just came from Custom-IEM.com's page (and their Facebook actually). Unfortunately no direct link to the product so one has to go to the custom-iem.com page and navigate.
Unique Melody seems to be releasing a Triple Dynamic CIEM. Seems to be using :-
1x13mm DD for bass
1x8mm DD for mids
1x5.5mm DD for highs
It also says changeable bass vents which I wonder if it's the same as how others have done their tuneable bass ports.
Unknown pricing yet.
Picture taken from custom-iem.com's page :-