Buttons are actually very simple devices, I've owned a yubikey (it got stolen, together with my other regular keys >.<) but I think it is actually very simple t

Buttons are actually very simple devices, I've owned a yubikey (it got stolen, together with my other regular keys >.<) but I think it is actually very simple to remove it, solder two wires to it and connect it to a switch of any size that you can attach to whatever is within your range of motion :) I'm based in the Netherlands so I probably can't help you, but maybe you could ask an electrician near you to help you with it.