Where can I find replacement for my AirPods rubber tip?

What specific model of AirPods do you have?

click here ➜ Identify your AirPods - Apple Support

The second generation AirPods (not Pro) do not use rubber tips.

If you mean the AirPods Pro 2, then Apple sells packs of tips for them.

click here ➜ AirPods Pro (2nd generation) Ear Tips - 2 sets (Medium) - Apple

AirPods don’t have flexible tips, so I’ll assume these are AirPods Pro.

There are different generations of AirPods Pro.

Here are replacement tips for AirPods Pro 2nd gen:

• AirPods Pro (2nd generation) Ear Tips - 2 sets (Small) - Apple

And for the 1st gen:

• AirPods Pro (1st generation) Ear Tips - 2 sets (Medium) - Apple

How to: Identify your AirPods - Apple Support