From what I can see, Carl Zeiss don't seem to sell under their own name anymore, but just sell their lenses to other frame makers.
I believe (But I could be wrong here) that Serengeti use them, amongst others.
You could always go retro of course:
I've got a brand new pair of Boeing-branded Carerras at home - from 1986! But I've been a Persol addict these last few years (Blame the Bond films I'm afraid).
