It's been a while since I have modded my broken GR07BE with MMCX termination and double driver from Shenzhen Sensor Power Technology Ltd. Here the results, mmcx housing I've made out of liquid polyurethane. Vent holes are glued up because of the driver's sound.    

Blue dot is + Actually one wire and shielding is not soldered anywhere, yet other 3 conductors are used.

As I remember, maybe 90% correct...

  The render is rather dreams of vsonic designer i think...  

I think those are something like vsonic is using :) http://aliexpress.com/store/product/10mm-speaker-unit-HIFI-driver/323026_32427040189.html?isOrig=true#extend

Modified Brainwavz M5 housings with Vsonic VSD5 driver! VSD5 shell was too bulky and with no MMCX... So I used silicone mold and polyurethane Polytec EasyFlo 60 Liquid Plastic to make plastic shell with embedded connector. The sound is clean as was on VSD5. Fully sealed shell with foam stuffed...

DIY plug  

  Yes, original plug was well-designed, even with it's hard plastic strain relief. Usually, as well as on GR07 plug, there are used types 2 press-forms in course to form connector, first holds soldered contact group and wire moulding them with hard plastic, second covers billet with soft...

Hope strain relief will be more pliable  

  Hope this helps, there is a description under the vid. Opening VSD3 and VSD5 shell.  

72 D "UniCast-14"

Made some silicone molds for GR07 MMCX holder and tested polyurethane and acrylic casts. Unfortunately, polyurethane shelf life has expired so there are bubbles in the piece.   Polyurethane:       Acrylic: