Lost eartips for Powerbeats Pro

Lost the round rubber cover NOT the earbud itself on powerbeats pro. Where can I get a replacement for the ear cover?

I lost the Silicone Ear Tip cover on my right powerbeats pro earbud. Looking for a replacement. The left powerbeats pro is fine. Just found several options on Amazon. Will google Apple Silicone Ear Tip cover and see what happens.

[Re-Titled by Moderator]