Sorry to pester people regarding obsolete keyboards but I've managed to track down a WK8 finally and I would like to tidy it up a bit cosmetically starting with the keys and then maybe the plastic screen cover which is a little scratched, I realise that it will be virtually impossible to track spare parts from new but I was wondering if anybody knows if the WK8 uses the same materials as all the other WK models, so say if I found a broken WK4 / 6 I could use the keys from these?

Thanks in advance.