Nord Electro 6D 73 broken key

Broken “A” key

So my 6 year old was playing with his drum while I was at work and decided he needed to use my nord as another drum. Luckily this is the only damage. Just wondering how hard it is to repair and where I can find the exact spare part. This is a Nord Electro 6D semi-weighted waterfall “A” key. Any help or suggestions would be greatly appreciated. Thanks!