"Moon Audio is often the first company I call for custom headphone cables, especially when I need something of the more unusual, more custom variety. (I was actually Moon Audio's first custom headphone cable customer, many years ago.)
So far, Moon Audio's Drew Baird has not turned down any custom cabling challenge I've put in front of him --- he'll even tackle the replacement of non-detachable cables, performing whatever surgery necessary to make the new connections. He's also a genuine, dyed-in-the-wool, bona fide headphone geek, so the moment he buys himself a headphone for personal use, it won't be long before he's fabricating the plugs necessary to accommodate that headphone with Moon Audio cabling.
One of the most recent niche cable upgrades I needed from Moon Audio was for the far-from-common FitEar in-ear monitors (an ultra-high-end Japanese crafter of handmade IEMs). I knew Drew was also a FitEar customer, and, much to my amazement, he'd already made a custom over-molded connector specifically for FitEar IEMs; so I ordered a Moon Audio Silver Dragon cable for the FitEar MH334 Custom, and also a custom Silver Dragon cable for the upcoming Shure SE846 while I was at it."
Jude Mansilla, Head-fi.org | 4 December 2013