If you can give me a weight of the package I can try and work it out roughly for you. I'm sure I got a quote for my loose one a while back and it was around £30 but I really cant remember, I just seem to have that figure in my head.
Use parcel2go mate. All you need to know is the rough dimensions and weight. I'd hazard a guess at about 2-3kg in weight, and about 70 x 50 x 30 boxed up. Should be about £40 I reckon, without insurance.
Just a word of warning If you use Parcel2Go just hope it never gets damaged we send clothing around the world with them and we have never had them pay out on a damaged package.