I need to replace a kitchen sink faucet for my mother-in-law. It is very old(40-50 yrs) and has to be 6" center. Does anyone know where I can find one(online) that won't cost an arm and leg? She has tried some so-called professional plumbers to no avail. I am quite capable of installing it myself, I just need to know where I can find one, if it's available. Thanks for any help. Roy