So how do you go about purchasing one of these strops? 

I've just received mine. After only one use, I can say without a doubt that 1. 2.5" is my favorite width and 2. This will be my favorite strop and my Go-To strop for a long, long time!
More complete review after work today, but this thing is sweeeeet
Good thing I don't have a No.1 strop... Yet... The one I use most is a Kangaroo strop, then SRD English Bridle tied with Tony Miller Horsehide... My SRD modular paddle... An antique Loom strop... Tony Miller's latigo... Another Roo strop...
I have strop problems.
Sweet! Did you get the cordovan or spanish leather one? After using my Spanish leather one for awhile I'm really starting to think I would like to try Jose's cordovan as well (SAD setting in...). Very high quality strops and I love mine!