Any CompanyB models you can order in the UK from Wargames Command Post. That should save you on some shipping. I think JTFM also goes through them as well...
Though JTFM shipping should not be too bad.
The trick with U.S. shipping if your order direct from us, Brigade Games, etc is to use global priority mail. It's a standard flat fee of about $39 to ship up to 25 pounds of items in weight to the U.K. Just needs to fit the box.