Maybe, this site will help--
http://www.fibersofmichigan.com/
or: http://www.marrhaven.com/
Hope this helps and good luck.

Roving is wool fibers that have been washed and combed/carded by machine into a long continuous 'group' of wool fibers, , but are not spun into yarn..you can easily pull them apart, so it would definitely be best to knit this together with yarn, for stability. ...and roving can be purchased at many yarn shops, of course weaving and spinning shops....and, on line. There are several different forms of roving, but what you'd probably do best with is something called pencil roving, simply because it is about the size of a pencil...duh!