Where can I get my ECU Electronic Control Unit for my Mazda B2300 1996?

I cannot find a place for buy my ECU (brand new or rebuild) for my Pick Up Mazda, 1996, B2300, 4x2, Automatic made in USA by FORD for Mazda Motors Company|||have you tyred the breakers, what about ebay there is a parts request section on ebay that might help..