Looks like Vauxhall are correct, No. 8 in diagram is showing two part numbers, so I would imagine it depends on your VIN number as to which one is required. Do you know if there is a part number stamped on it?
Referring to the diagram above;
8. 90539246 - Bracket, Right Engine Mounting
8. 92097031 - Bracket, Right Engine Mounting (IDENT CF) (RAYONG)
9. 9156986 - Support, Right Engine Mounting
10. 9223092 - Screw, Torx, M10 X 55, with Washer, Bracket to Support (x3)