I do make the butt rest extensions. My wife absolutely hated that short pad. She fell in love with the extension.
I may have misunderstood your prior question. Both of my bikes came with the aftermarket racks. So I am guessing that you would still need some of the hardware needed to connect up to the passenger grab rails. I will investigate this tomorrow. I will let ya know.
I appreciate you getting back to me so soon. Okay, here's what my 3 daughters (12, 9, 6) would like along with my wife- the backrest you have on your C10 adjusted for someone around 5'1" give or take an inch. Here's what I want- said backrest mounted on my bike without an aftermarket rack that is easy and quick to remove. I like the blue cowl over my oem "rack". Like I said, I don't know if it needs to be as tall as yours since my wife is only 5' and being too tall it may push her forward a bit. Where did you get the pad on your bike? It looks like a nice setup. thx
edit: after looking closer at your rack, it looks like you just used the rack one gets when they purchase the kawasaki backrest/rack to mount your extension to. to do what I want to do, would take a custom mount which would probably be more trouble than it's worth.