Try an actual shipping company, the kind that load big wooden
pallettes onto ships. I used one when I emigrated to the US 12 years
ago and was surprised how reasonable it was, and I had *many* times
more than just 45Kg...
Only drawback, you often have to pick up from their docks yourself or
you'll be charged a disproportionate delivery fee for the last 10
miles, with the driver expecting a serious tip for carrying the goods
in.
G