what about magnetic tank bags
the tank we see is a plastic cover
so you can easily attach magnets under it, and any body panels
I had one tank bag on a dual sport that had really strong magnets and I just popped it up to fill the tank
same could be done on the z if you only use the magnets to hold it down
good for small items, I used to put fast food in the one I had
it also came with straps to wear as a small backpack too
I think it was by icon, it was pretty small I think only 1 zipper and expanded a little bit when packed full