I would agree to check with chockostang as already suggested to see if he has a core . You can send him the internal core for possible partial credit even if you can't provide the entire pump with reservoir core. Another option You can also most likely get a rebuilt PS pump from Napa or O'Reilly's and just compare the pump and reservoir to see if it match's. If it doesn't match you don't buy it and have them send another. I and countless others have used this process. Unfortunately many rebuilders do not provide the reservoir . On another note is that you typically can include your swiss cheese reservoir as a viable core because they don't typically inspect them . With all that said a auto part store rebuild PS pump are not the most reliable . Always absolutely only use type F fluid in your pump. Do not let anyone talk you into a substitute.
