I made some out of some HYD tube and some aluminum plates. i did it for free sincec i had acces to the stuff at work, but the stuf is cheep. go see a hyd shop and ask them to bens it up.just take your bike to them to measure by. they arent pretty,,,,but hey,,they cant be seen under the bags!
I do plan on useing them as a template to get some stainless round stock, and bending that and putting a stainless nut on there (welded) that has the threads reamed out. It will look good.
all for probably 20 bucks or less.