Had a response on this from "lewisman" thanks.
However I have now bought this tiny boot lip spoiler from eBay Australia which sticks onto the rear boot panel perfectly at 1210mm length, base depth 26mm, height of lip 18mm. It only took 4 x days to arrive, which was better than our own Postal Service in the U.K!
http://www.ebay.co.uk/itm/Boot-LIP-SPOILERS-1210mm/172261934884?_trksid=p2045573.c100033.m2042&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D35377%26meid%3D4c699886b97b4642a2611780869cd720%26pid%3D100033%26rk%3D4%26rkt%3D4%26sd%3D181832870719