Guys on here have parts if you need anything. Buellsterparts, Twin Motorcycles and American Sportbike have oem parts. Ebay has a ton of parts. As with any discontinued model, car, truck or motorcycle, parts will need to come from parts vehicles eventually.
They're a riot to ride and there is still a strong aftermarket for engine parts to liven up the engine. I wouldn't hesitate. I have a 96 S1 and and 08 Firebolt and haven't struggled at all to find parts.