Walked past an audio shop here in HK and found someone selling the connectors for $8usd/pair shipped worldwide (stamped envelope). As someone who struggled to make my own connectors, and failed when the connector disconnected, causing my custom IEM to drop on the floor with the faceplate cracked opened and the shell also cracked, these molded connectors were godsent. So I want to share with you the good news! Very high quality connectors, the seller sells two versions, the protruded version for the UE customs, and the regular intruded version for the triple fis, superfis. I have the protruded version on my Freqs right now, it is a tight fit, no more hot gluing my diy connector to the IEM!
His email is derek [at] discovery-global.com
And no, I am not affiliated with them in anyway, I am just extremely happy and thankful I've found them, if you are making IEM cables, you'd understand my excitement.