Each foot peg can be ordered from a dealer as an assembly and basically just snaps into the slide rail. You've got markup for sure, but zero hassle. Most any fleabay special should be complete as well, and easy enough to compare to your stock peg.
PS ... didja know you can install multiple pegs on each side. Didja? Didja? <G>
In case you're wondering - I have a prosthetic leg and use the dual pegs as a heel toe setup for holding the ankle in place - no worries about hitting a bump and seeing my leg hanging from a tree in the rear views. <G>
Also handy for stepping up and over a trunk ...