The bonding phase is realized, I used Colad Magic Fix. 
Need yet to see if it will fit, but I guess it will, otherwise dremel is my friend, that I also used to make the surface somewhat rough before bonding.
Using the original screws will have the risk of breaking again, so I am considering to bond a few stainless steel short threaded rods in the screw-holes, and fasten the handle with 2 self locking nuts.
That way the bonded pillars will only have tensile stress, and no radial stress,