I stumbled across this Kickstarter that has some very Tau-ish buildings and fortifications. So close they might get GW on them I guess..
They seem to have tried before but failed, but.. I'm tempted. That Skyshield Landing Pad looks sleek and the bunker looks better than my own I've made.
One warning sign is that none of the Tau buildings are shown as models, only concept art.. so.. I dunno.