DAVID - Yes, the sealed beam headlights are still available... but I think they're expensive, but maybe you won't. They're a #4411 sealed beam.
The frt cowl around the headlights was/is diecast, some of the sponsors above (colorful boxes) could probably fix you up with a used unbroken one. Or if all the pieces are still there someone with a TIG welder may be able to repair that one.
The baffle on the deck being rusted up and bent up will still allow the mower to mow, just not move the clippings to the discharge chute as the mower should, Some of the grass may escape the blades and not get mowen properly too. It's not hard to remake the baffle, you can bolt them on, just takes time and a strip of 1/8th inch thick X 2" wide steel, and some little short pieces of angle iron, and some small 1/4" bolts, nuts & washers.