I've seen a few older Nording Freehands with black & white swirled stems, but I'm not sure I've ever seen a Zebra stem. It might be pretty cool though.
I'd like to see one on something like a black sandblasted straight billiard.
Yeah Nording does a black and yellow sort of bee stem, haven't seen black and white. I have some white and pink, white and purple striped blanks. But no black and white.