Club members can run a free ad in the KFOCI MONTHLY BULLETIN in the WANTED section for assistance from members. Otherwise, check with Larry Barker or Willow Run Auto Parts as starting points. Larry's phone number is in the part for sale section of the Bulletin's ads and Willow Run Auto Parts has their own website.
Also, be sure to go through the information in the 1947-1948-1949 (Blue cover) factory shop manual for the water pump. The information can save you problems during a replacement.