Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

hi all, im looking for a mounting plate for the Corsa b rear spoiler, does anyone have one for sale? also, is there anything i can go about the gap from the back washer to the spolier if i cannot find one?

a mounting plate? not sure
when i had mine fitted i took it to a body shop. he just botled it down and body fillerd round the holes on the inside