Herman Miller Fabric...available??  

I am NYC and had a chance to see the Knoll wall of fabric samples - lots to choose from -- It'll do your head in.
Always gluttons for punishment we see online that there is a Herman Miller Showroom here on 6th ave. I got a chance to look through their catalog and see some cloth I think would work with some pieces we have.
Do they sell to the public?? ---as opposed to dealers.
I never hear mention of their fabric...just wondering how easy it is to purchase...and actually how their prices compare to Knoll for example.
Thanks!