The wiper cover sounds like the same set up Dodge used in the 39-47 trucks, and all the military trucks from 40 until about 68. Don't know how much stuff fits the 39-47 cab, but www.vintagepowerwagon.com repos a lot of parts for the military trucks many of which carry over to the civilian trucks of 39-47. might be another choice. I built a hot rod 39 Dodge pickup, and found a lot of stuff there for better prices then many places offered. Its pretty standard the one company repops a part, and everyone pads the bill and sells that company's same parts. Vintage power wagon repops a lot of parts. Gene