There are two local contract manufacturers who will make cables, but neither one likes doing it and so says half-jokingly that they price accordingly. (I think those jokes are of the "haha, only serious" variety, but I've never asked them for a quote on anything specific as I tend to make my own cables for prototypes and I've not yet put anything into volume production where I couldn't make things by hand.)
Neither of them are online design like dirty. (It's "call for price", only worse.)