Here are pictures showing the issue with my 16" A Zildjian, which I mentioned in an earlier post. I believe the original owner used it as a hi hat cymbal, which probably explains how this happened! BTW, it is no longer being used as a HH cymbal, but was just set up on a stand. 16" hat cymbals just seem so large!
I have had good luck repairing cracked bells with JBWeld.
Before you toss it I would try that. Maybe even drill some holes through the crack so that the JB creates a bridge through both side. Might even use some mesh drywall tape imbedded along the worst of it.
Brazing is really the operation that is required for brass though finding guys that still braise well is not easy.
I am a decent braiser, if the were my cymbal I might try it. Would take a little luck though.