Hey Brian,
I think you can still get most of the carb parts from Suzuki, the rubber parts for sure. Don't use ones from a hardware store, or you will be back in replacing in a few weeks because of the fuel.
The rubber plug over the pilots is absolutely essential. The carbs pull the fuel for the pilots through the main jet. Without the plugs, the fuel will go the other way and be pulled directly into the emulsion tubes without passing through the main jets, making the bike run extremely rich.
BikeBandit.com shows the float assembly still available, but not cheap $52.25. You might find a complete set of carbs on Ebay for less than that if you are patient. Sometimes complete jet kits come up as well that will have pilots.