I do not remember where you live but in the USA I know of 2 places that sell it.
Judith M Millinery in Indiana sells 2 types of wool felt at about $20 - $25 per yard and Hats by Leko in California sells a high end millinery grade for about $165 per yard. Have not purchased any from either so I cannot testify to quality.
Thank you Sharon, I live in the UK, but I can order from the US.
I know that there seems to be a couple of different weights, so I need to find what weight I need.
These might be a bit closer to home. Had a couple of hoods last year and were a little thick, but fine.
Thanks for your help I have found some on tow sites all I have to do now is work put the weight of the wool felt I need to make the hat. It is just one thickness of felt it isn't stiffened with bonder web or anything like that.