Thanks for your help, Helly & AJP. I have found a website called Country Bumpkin that seems to have that Doctor's Flannel and also some wool/cashmere velour and wool blanketing. It's just hard to decide which to use without touching it... I'm not sure if the Doctor's Flannel is going to be warm enough and with the wool blanketing, I'm concerned it might be too thick & warm.
Helly, could you give me the addresses or names of some of th sites you like? If that is even allowed here...

I'll keep you updated about my progress.

Alex