Just changed blower motor brushes; thought I'd document some info for future reference.
Checked archives herein, only found one active source for brushes on the internet at this time, the guy up in the northwest, about $30 shipped.
Needed to get it up and going, so looked around at local shops for something close.
OEM brush is M41. 8mm x10mm x about 16-18mm long.

Closest I could find locally was a 8mm by 16mm and about 25mm long.
It was actually labeled 5/16 (= 8mm)
5/8 (= 16mm)
1 " (=25.4 mm)
Filed the 16mm down to 10, cut the length off to about 16, tapered it to sorta resemble the angle on the old ones, and popped them in.
Not too big a job, just took my time with the 10mm filing to get it uniform.

Now let's see how long the old commutator will hold up.

DG