In the past I ordered a brush for a dust shoe on Amazon but it had a hem height of over 20mm causing it to stick out past the removable part of the dust shoe.
Anyway, I came across a brush on McMaster Carr that has a plastic hem, roughly the same thickness as the cloth hem brush but a hem height of only 5mm and they have brushes with a total height of 1", 2", and 3".
Easy-Cut Strip Brushes
Cheers