Hi again Luke,
I emailed OneRemote a few days ago about a similar sized item and they said that they could do ‘letter sized’ UK postage for about €21. They even added a checkout box for me, but in the end I didn’t buy the item anyway.
It’s probably worth getting in touch with them by email.
(They did also say that they can send stuff anywhere in mainland China far cheaper than to UK!)
EDIT: You could also try http://www.avaservices.co.uk
