These are the mounting brackets of the popular Cable Chain (http://www.thingiverse.com/thing:11978) designed to fit the Hictop Prusa i3.
TIP: While the old bolts will work, you might want to use slightly longer bolts to make it easier.
Hictop Prusa i3 Aluminium
The bolts can be difficult to get in for the X-Stepper mount because they just simply are very short, but it will work. Otherwise I'd suggest sourcing slightly longer bolts.