Request: Looking for Motorcycle parts

I have recently purchased a 1982 Honda Nighthawk 650SC for $200. Needless to say there are a few things missing from the bike. I need an instrument panel (speedometer/ tachometer/ lights), as well as handlebars, engine casings, air intake and exhaust system, as well as front and rear turn signals a gas tank. The back half of this bike has been replaced with the back end of a Harley Sportster, so I am wondering if I need the turning signals of a Harley Sportster instead? Also, I need some seats for myself, as well as for a passenger. I guess these have to be seats for a Harley Sportster in order to fit.

Also, I am looking for old, crappy gas tanks and used helmets to do some airbrushed murals on. A motorcycle wrecking yard in my area says they have some old, crappy tanks for about $10 each. The tanks don't HAVE to be crappy of course.