Couldn't find this previously linked via search but I stumbled on this Japanese vendor "ZBROTHER" and they carry tons of cool bobbles that fit Z's. Most of the site is tailor made for the Japanese 400 range bikes but there's some pretty cool (Mostly bosozuko) gems on there when it comes to inexpensive bars, moriyaki, yoshimura and beet parts. Some nice looking exhausts that replicate the yosh's too that I've never seen sported. Can't speak for product quality or anything but worth checking out for some off the wall builds if anyone's interested.
Translated Page Link
Actual page if anyone can read Japanese:
ZFATHER