I've just bought my third E38 7 series which has replaced my first two that have each had some niggling problems such that I prefer to get another.
I use these as spares for myself (hence the same colour) and now have two of most things so I can off most parts to help you out in the same way.
One has grey leather interior, the other sand beige. Excellent engine (mine are 735s but many other parts are inter-changeable on models with other engines), tiptronic gearbox, torque convertor etc.
Everything is available from one or other of the cars.
All parts can be quickly sent by courier from £7, or collect from mid-Lincolnshire . Best just to ring or message me, Andy, any time - I'm retired and home most of the time.