For the right side 91A 6775 Pan (engine dust) RH and for the left side 91A 6776 Pan (engine) LE LHD from the Green Bible. These fit 1937-41. These are for the larger engine. There are different pans for the 60Hp (post if you need the number). The "1940 Ford Book" from the Early V8 Club (earlyfordv8.org) should show you what you need (I don't have a copy to check). There are probably a lot of them out there that look similar. They go between the oil pan and the frame and keep water/dirt out of the engine compartment and help air flow across the engine (or so I have been told) and are not in a location to protect the things you listed. They were usually thrown away by the first mechanic that worked on the vehicle.
Charlie Stephens