Can any one tell me where i could buy an oil pressure sender switch and wrench for a 2004 dodge stratus 4 cyl

any car parts store , make sure you write down the year make model size of the motor,the oil sending unit sort a looks like a spark plug, if you have never changed one,the hardest part is probably locating it and getting your wrench on it. the part store guy most likely will have a picture where it go on the computer, if not he will come out and show you.