I've recently completed the City-Ship (Bactrian) License campaign in ES 0.10.8. Only then did I notice that there are no shipyards that sell them. I know it was available for sale in 0.10.7, at Midgard, Naos and Valhalla; now it's gone. Were they removed for some inane reason or is it one of the plug-ins I've added that removed them?

I leave this, with the answer: it was the Bactrian Mission Master plugin. If you wish to be able to by Bactrians, do not install this.