I tried to get a UK firm to cut and send anywhere in the World the 3 Heatsinks for the 6kW-15kW OzInverter Power Board.
But sadly they decided to charge silly money.
At least the Chinese see a business opportunity and are willing to stock and sell a particular size of Core. However, like most things there seems to be a middle man acting as the agent and can promise everything, (personal experience). So I await to see the pics of the Silicone Iron cores.
My core winder/maker in the UK can only wind up to 60mm thick, that's the max his machine will take.
My 6kW OzInverter is happy with a 28kg core, my big OzInverter has a 36kg core. Its handling the 36kg core that problems arise, like Damaging the secondary enamel when winding, lifting and moving, optimising the cut out on the core support table so you can physically get your fingers underneath and lift and turn safely.
Yea 36kg is my safe physical manipulation max. As Oz once said, "You will need a crane to wind that". I didn't but it was close.
I look forward to watching this huge build.