Nothing to add here, except to say that I love the mods you've done to your bike! Do you do all that yourself? Nice work either way!For the rider or the passenger?
I made my own , for my passenger (see Backrest in photo link below)
Kawasaki made an extended backrest (passenger) that you can still find on eBay and sometimes for sale here.
Protact makes (made?) one for operator.