1971 Dodge truck parts

I'm getting an idea of how I want to go with my 1971 Dodge D-100 rat rod project. I'm looking for parts. Some are repair and some are things I want to change. If you know where a parts truck like mine is in the S.W. Indiana/Southern Illinois/W. Kentucky area, let me know. Parts I'm looking for are;

Windshield. 1961-71 pickups fit.

8 foot step side bed. Dodge used this bed from 1948 to 1985. The fenders were changed in '53 otherwise they are the same box.

Wiper arms. These seem to be made of unobtainium. 1967-71 will fit.

Wiper linkage bushings

Rear step bumper. I think 1967 to 2002 will fit. I measured the outside of the frame rails on both my '71 and my '84 and they are both about 38 1/4 inches.

A nice original steering wheel would be nice but I may swap in another type of wheel if I find one that looks cool.