Anyone used to or familiar in changing motor brush

[abdulbadii]

Anyone used to or familiar in changing motor brush, as it broke, pulled out hard beyond its withstand but no successful search on its supplier

The drill is ATS BL-10KK, relatively rare to more common drill brands Bosch, Makita, JLD, DeWalt, Milwaukee, Wickes, Hitachi, as got that from yard sale

so please one quite knows how to get its closest compatible from other brand to get it work normally
the connecting input,


the carbon, case,


Edit
the carbon opening hole dimension:

[max.wwwang]

Carbon brushes of virtually whatever size can be found on Aliexpress at surprisingly low prices without any quality problems at all, based on my own experience.

[Psi]

If you can't find the right brushes that fit, then find something oversized and grind it down to fit.
Carbon brushes are soft and easy to grind down with a bench grinder, orbital sander, or just a file.

Be careful if using a power tool/grinder, brushes are softer than you think and it will take off material very quickly.  A large file is probably safer.

[Wallace Gasiewicz]

ACE Hardware has some brushes, do not know if this is one of them.

[mikerj]

If you can't find the right brushes that fit, then find something oversized and grind it down to fit.
Carbon brushes are soft and easy to grind down with a bench grinder, orbital sander, or just a file.

Be careful if using a power tool/grinder, brushes are softer than you think and it will take off material very quickly.  A large file is probably safer.

A flat surface and sand paper or emery is my preferred option.