Hello,
First I have to apologize my poor English, I am from Estonia and English isn't my main language.
I just looked at those stock headphones and I wanted to save that middle control button and mic, so I found old Sony Ericsson Walkman player headphones what were dead (the wire was broken from connector) so I brake the mic and control button housing to half with little knife, and swapped the earplugs with sony ericsson ones.
It's pretty simple to do that, here are some pictures:
If you are trying to make something like those by yourself, and damage them then don't blame me. Cause you did it, not me.
Well thanks, those LG ones were cheap plastic anyway, then why don't turn them something useful with broken sony ericsson in-ear plugs.
Gonna buy new earplugs anyway, but those were easy to do, and I was bored. I didn't even untied those OEM earplugs, before to try and listen with them, then I had this plan to do.