Amen, Greg! However, Bosch also told me that the reason they do not sell brushes for blower motors was because the wiring got thinner (???!!??) with age and would burn out in time.
1985 190D 2.2l Sold-to Brother-in-law
1996 Mustang 3.8l -"thinks it's a sports car"
1988 Grand Wagoneer - Sold (good home)
1995 Grand Cherokee Ltd -"What was I thinking??!!"