420SEL Steering Wheel (Airbag) Cover

Hello

I have tried but failed to look for a new or good condition used cover for the steering wheel where the three point star logo and airbag is.

Reason is that over time it has started to crack perhaps due to pressing of honk.

I also heard that you need to buy the entire airbag assembly (from MB dealer) and can't just buy a piece of the cover.

If you know anything about this or can help me find a piece of aforementioned cover for the steering wheel airbag please help.

Thanks in advance.