Does anybody know what other vehicle fuel tank will fit my 96 Winstar Gl, it's a 3.8 ?

 

Some Ford Parts Depts. will be cooperative and if you provide the info like year, model, engine ,, or VIN they might be able to based on that information tell you if other vehicles use that same tank.
Gas tanks are specially constructed and pretty sure a "Fits all" Can come with some problems. They're not cheap, but nice to get the right part the first time.
Not knowing why you need a tank, but if repairable , some radiator repair shops will clean and repair them.

Also if the fuel pump was never replaced, that would be the time to tend to that . I realize it is not a new vehicle, and can cost some $$$ , but when working with gasoline , what you do now, do it right, and do it once.