It hasn't been translated, the next few volumes go more into the 13 underworld families or some such, of which both Murasaki's family and the family Shinkuro got the horn from are part of.Anyway, is it possible to find the light novel translated on the net? Kinda want to read it now.
If anyone would translate the novels it would be Baka-Tsuki but they are not really a group as much as just a bunch of translators with a forum, so most of the novels they end up picking up are voted on and they don't tend to do stuff like Kurenai.
XI Wiki



