I know that they used that motor in the 626 during that time frame. Probably the MX6, Ford Probe, Ford Contour and Mercury Mystique also.
Basically speaking when you're looking for a used motor:
First, find a yard that specializes in the motor your looking for (some yards only deal in imported cars, some don't, some deal in whatever gets brought in).
Secondly- You just tell them your looking for a Ford/Mazda 2.5 V6. You don't really have to give them much more than that Unless they ask you for more info. Because, let's say you're looking for an engine for a Toyota Corolla - you may get a break on the price by saying it's for a Geo Spectrum.
Good rule of thumb - don't give anymore info then you have to and (your doing it now) Do a little research.