Fibers and steels? Available in rebuild kits for late 70's Honda Civics with the 2 speed automatic transmissions. Yes they interchange. Also less expensive than the bike discs. The car rebuild "kits" have fewer discs than the Hondamatics take. There are a lot of suppliers out there for the Civic transmission parts. Here's one that I've used.
Here's where I got them from in Sept. 2012.
"We can get these for you separately. The frictions are $1.93 each and the steels are $5.25 each. We will have to drop ship them from the manufacturer, freight should be about $10.00. If you would like to order them let me know.
Thanks
Julie
Julie@Makcotransmissionparts.com
Hope this helps.