I had to send an inverter for my turbine to Italy for repair, was astonished how cheap it ended up being.
Went on google and searched for some of the parcel sites, you input details, size weight etc and they will come up with a list of possible options, can't remember now but I tthink it was parcelmonkey I ended up using, but tbere are heaps, can check if you want.
Parcel went with Parcelforce for a lot less rhan the Parcelforce website price. Just be sure and be accurate with size and weight.