so does that mean there will they will have to make to "engines", one with and one with the thrust, should be a nice spares issue.
No, as with a lot of engines the reverser stays on the wing when the engine is removed.
Airbus is different to Boeing in that they have 'doors' that pop open from the side of the engine
The engine in the picture is a CFM56, Airbus A340-600's that have RR engines use a thrust reverse sleeve or translating cowl, so it's not strictly an Airbus/Boeing thing.