Just an update, this project never really took off since most of the (limited) reshell requests were 16mm or Radius twin dynamic drivers.
The CIEM designer can't know for sure if it will work, since it depends on the size of your ear, and the complexity of the universal IEM which he'll have to dismantle.
So, I was skeptical to handle the logistics of a number of Sony EX1000's or complex universal IEM's, should the designer dismantle them and then the driver doesn't fit, and I don't speak Chinese.
I'm sure with the right amount of time and creativity you can turn any universal IEM into a successful custom IEM with potentially superior sound, so it is a sound pioneering project in theory, which I would definitely undertake if I made my own CIEM's.
Nonetheless tomscy2000 is a good bilingual CIEM ambassador if you feel like any exotic IEM's from the far east he may be able to help if you ask nicely.
Thousand Sound do speak proficient English and answer concisely, and Tomo at
http://hfi.jp is the ambassador for Rooth.
On a seperate note, after extensive listening to the JH11 and JH16 I think more than 6 drivers is overrated, you need a very accurate crossover design to eliminate the phase shift.