We were one of the S76's from last week - can thoroughly recommend ACL - really helpful Liverpudlian bunch.
http://www.aclcargo.com/
Definately take the RoRo option (mind you, you say "non-flyable" so perhaps you don't need it to arrive in tip-top condition...?) as they have separate sections for the helicopters so they don't get battered by anything else.
You'll need to sort out the VAT man as well probably - Martyn Fiddler Associates for that one!