Our 777's have an aural (C-Chord) and visual alert (highlighted white box) at 900' when approaching a selected MCP altitiude and also have an aural and visual alert when departing a selected altitude by 200' (highlighted amber box and EICAS alert). There is no difference whether the autopilot is engaged or not.
I wasn't aware that there were options on this sort of equipment. Not surprised if it costs extra to install though.