3 ring binder HELP

I have ordered loose leaf book from the US. So today I realised people in the US use 3 ring binders, and not 2/4 like here. I couldn't find a shop in the UK that would have 3 ring binders, not even Amazon, and the one they had was even more expensive than the book itself....
Does anyone have a 3 ring binder that they don't need?

Thanks.

Surely, Staples and the like do them?

There are loads on ebay

They only ship from America, and with shipping the ring binder would be more expensive than the book I bought.