I emailed KUSA about this as I was thinking of ordering from them (and subsequently have).
From what I had heard in the UK we were being hit with some excessive customs fees, however KUSA told me they were working to reduce these fees.
Anyway, I ordered 3 kendamas for just over $100 to take advantage of the free international shipping, and in the hopes of mitigating any customs fees and I was plesently suprised when I recieved the package 10 days later with
NO FEES to pay. So whatever they did worked.
Thanks
@KendamaUSA 