You can purchase the parts from us. Please write to support@anker.com and let us know which parts you need and your latest shipping address.
By the way, we include spare parts in the packaging.
For example:
What You Get: Eufy RoboVac 11, remote control (requires 2 AAA batteries, not included), charging base, AC power adapter, cleaning tool, HEPA-style filter, 4 side brushes, welcome guide and our worry-free 12-month warranty.
https://www.amazon.com/gp/product/B01LYCLS24
There is 1 spara filter and 2 spare side brushes (the other 2 need to be assembled).
Thanks!