Hi Rusb,Don't know if you have your load cover yet but this is on eBay.
http://www.ebay.co.uk/itm/VAUXHALL-ANTARA-PARCEL-SHELF-LOAD-COVER-/190884084627?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2c7193fb93
Good Luck
http://www.ebay.co.uk/itm/VAUXHALL-ANTARA-PARCEL-SHELF-LOAD-COVER-/190884084627?pt=UK_CarsParts_Vehicles_CarParts_SM&hash=item2c7193fb93
Good Luck