I was checking in case they fitted my ASR33 but it uses
narrower ones.
I see lots of Teletype paper and paper tape on eBay but never ASR/KSR/
RO 33 ribbons. Probably easy to get if you know what to ask the
suppliers for.
Teletype ribbons are standard typewriter ribbons of the type with rivets
/eyelets at the end to automatically change the ribbon feed direction.
Should not be difficult to find. Ones with Teletype on the box
occasionally show up on ebay but I haven't seen one go by recently.
The Okidata Microline 80 etc ribbons are the style you need for an ASR33
and may be easier to find in a search.
Random matches from search
http://www.officesupplyoutfitters.com/okidataml80.html
http://cgi.ebay.com/Okidata-Microline-80-82-92-Ribbons-Qty-7_W0QQitemZ26015…