Kimiko, glad you posted that. I wasted/spent a lot of time perusing
the site, and they actually do have the wool undercollar felt! http://www.bblackandsons.com/sewing-supplies-pocketing-felt-c-68_80_100.html
After the holidays I intend to make a special trip just to see them
(oh, and eat in
A few years ago I bought the last roll of hair canvas at my local Hancock's, on
clearance. It was almost a full bolt, as hardly anyone was buying it according
to the manager at the time. I've got a little of it left.
B. Black & Sons is great for the tailoring supplies (
http://www.bblackandsons