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.
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.