IF you have all the original broken parts you may even be able to repair it.
Back in the 1980s I fixed a Tandy 1000EX key by using a drop of model(NOT superglue) glue on the broken mating surfaces AND repeatedly working the key so the glue would only set up on the non moving surfaces. Afterwards you couldn't tell the difference between that key and others.
Unless someone can convince a Chinese factory to make a run of Amiga keyboards and mice we will all be using adapters and PC input devices.Since generic PC keyboards sell for only a few dollars maybe there is a way to open one up and rewire? it for Amiga.