I've just come across this eBay seller making rear spoilers for my V70. Looks like they can make them for many cars:
https://www.ebay.co.uk/str/salla400?_trksid=p2047675.l2563
and the prices look reasonable.
https://www.ebay.co.uk/str/salla400?_trksid=p2047675.l2563
and the prices look reasonable.