Trying to fix messed up hood

#1
The lighting doesn't work, so I wan't to get a new light ballast. Just a simple one for cheap price that I can wire and screw in to where the old one is, and pop in a light bulb, I don't even know if that is possible though. The hood is a D shape and the light is under the hood covered just with a clear plastic. Which makes it harder to get some proper lighting in there...