M-audio hammer 88

I have a M-audio hammer 88 with 2 octives I need replacement keys a few got broke off

Where are you located - I think best for you is to contact the distributor in your country/area

https://m-audio.com/distributors/P20

United States, Arizona

Go here - type in your address - find dealer - your best option I think

https://m-audio.com/dealers