Hi Robin - do you still have that spare tank available? My tank got a 'puncture' after someone helped me change a flat tyre and jacked the car up in the wrong place! I have a 1996 e38 (730i). The jack dented the underside of the tank on the driver's side and seems to have pulled it apart by the seam by the side of the car. Seems these tanks are very hard to get hold of and would appreciate any advice on getting one.