fibers are available at from Edmund Industrial Optics
IMHO, Edmund does have lots of neat stuff, but they're VERY
expensive. Most anything that you find in their catalog or website is
available for less$$ from another source, if you serch the WWW.
p.s. I have been buying from them since the 1950's ! ! ! I recently
decided to give up on them, because of high prices.
Lord of the Rings
607 S Hill St Ste 850
Los Angeles, CA 90014-1718