You don't say what kind of foot you are looking for, but sweetana3 is right that there are lots of different feet available. The Featherweight is a "short shank" machine. Feet do not have to be made by Singer to fit them, but even vintage Singer feet are easy to find.
One tip is that the thread cutter may have to be removed from the needle bar in order to accommodate some speciality feet, such as a walking foot.
Dayle