you can always download from here: ed2k://|file|mu_windows_8.1_windows_server_2012r2_windows_embedded_8.1industry_update_x64_4046913.zip|807854846|A1B50E1C33241FC8840EEB36FCDC96A6|/
I think they were removed because it was too confusing and the updates failed on a lot of people and caused hate and discontent! lol
They were removed shortly after the Update was available on MSDN, I asked MS why and they said 'they were looking into it', didn't get any further response