@TheGrapeEscape 
did
@Pewt sell his Audisons, that will give you an 8" door driver and I'm sure he had the tweets too?
On my 67 plate the magnet had rusted and come unglued jamming the voice coil gap so the speaker effectively jammed solid despite getting a signal, upon replacement the drivers one was in a similar state but hadn't been jolted/slammed as much as the passenger side... not pointing a finger here.

Good chance to stick another layer or two sound deadening in too but quite why VW put an 8" speaker hole in the T6 doors and then cheaped out by putting in pea shooter 6 1/2" drivers?
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Edit two and I've got the Audisons, you'll need a sub still for skull crushing bass but for listening to Ladytron they have real presence!