The jig is easily made from a scrap of 2X4 with a jig saw.  You can
use most any clamp.  I usually use a C clamp.  Any good wood
glue (I use Elmers) will work.  Remember, a good glue joint is 
actually stronger than the wood itself.  To prove it, glue an old
piece of 2X4 and then break it.  Usually the wood around the glue
breaks, not the joint.  I haven't tried it, but I believe  hide glue would
also be quite adequate.  The handle has quite a bit of stress from
the angle it is at, but it also gets much of it's strength from the screw.
Just close the clamp quite firmly, but be careful not to force it which 
can force too much of the glue out and "starve" the joint.
Epoxy is not necessary, but will work as well.  Be sure to "dry"
clamp the handle before applying the glue so you can make sure
it stays aligned properly.  Over clamping can also force the joint
out of alignment.  If the handle is broke at a particularly odd angle,
it may be difficult to keep it from slipping out of alignment, in which
case you may need to use additional clamps.  After you put the glue
on, if it refuses to stay aligned (sometimes the glue seems to make 
the joint slip more than when it was dry clamped), separate the pieces
immediately and clean them off (water will completely remove Elmers),
Alcohol removes hide glue and will actually dissolve even a good hide
glue joint that has completely set up.  Epoxy - I don't know, you're on
your own there.  A good reason to not use it...  Although, come to think
of it, I think you can mix epoxy to set up almost immediately, eliminating
the need for clamping.  BUT you gotta get it right the first time...

Well, I've told you all I know and then some.  Any good woodworker can be
at least as much help as I have been.