I have a headstock casting that I have used for a number of years that I no longer need. The casting had a crack in it when I got it. I drilled a stopper (hole in end of crack to stop propagation) and it has served me well over the last five years. I received another casting from a fellow member which made this one excess. It can be had for the cost of shipping. Here are some pics of the casting:
Front:
Back:
Crack (outside)
Crack (inside)
Contact me via email or PM if you would like it.