Wanting to move away from the cast x-ends but also liking the clamp style, we designed some new ones to work with the boltable PLA bushings. These are interchangeable with the standard Prusa or cast Clonedel x-ends.
This x-end set calls for a little extra hardware, but no glue and the ability to change out bushing easily makes up for it.
x8 M3 20mm SHCS
x8 M3 12mm SHCS
x24 M3 washers
x16 M3 Nyloc nuts (or regular nuts)
These x-ends use the boltable PLA bushings rather than the glue in PLA bushings. You can find the boltable bushings here: http://www.thingiverse.com/thing:10647. Also, we have made Igus bushings holder for these x-ends too: http://www.thingiverse.com/thing:13229
-Parts and files: GPLv3
-Images: CC BY SA
You will need two clamps and one each of the idler and motor ends.
It is easier to bolt the PLA bushings onto the x-ends first with the 12mm screws and nuts. Then you can bolt the clamp on each end with the 20mm screws, but leave them loose. Once you put the x-end together you can tighten down the clamps.