"There's a website" ~ Tom Custom
http://www.japjunk.net/content/view/13/2/
the internet is loaded with Super 90 pages, don't know how helpful they'll be but i ssuspect better than nothing like the old days.. google, yahoo, ebay...
the old Honda engines are still in production under different names, Lifan comes to mind. my understanding is that very few changes have been made and parts generally interchange. again countless sites and ebay...
http://www.hooperimports.com/dept.aspx?dept_id=24"Enlightened statesmen will not always be at the helm" ~ James Madison