Sissy bar???

[Okac]

Hi,
This is my first bike I bought it new and I'm very, very happy with it, i had some minor problems and i still have , there is a rattle in my exhaust when the bike is cold,i think that something is loose but i will fix it for sure. Anyway i would like to ask if anyone knows is there a sissy bar for this bike? Except for:
http://redoakcycles.com/Sissy_bar.html
which is sold out and a little pricey for me.
Maybe someone knows if i can fit something like this:
http://www.aliexpress.com/item/Backrest-Sissy-Bar-Set-W-Luggage-Rack-for-Honda-Magna-VF-250-750-VF250-VF750-Free/922102883.html
or maybe
http://www.aliexpress.com/item/Backrest-Sissy-Bar-Rack-Set-for-Honda-CMX-250-Rebel/671349708.html

Thanks.