Cross reference for a grey market Kubota mini hoe.

Can anybody suggest a place to look, to find out what the North American equivalent machine is for a grey market Kubota U20 mini? A neighbour has one that is rumoured to be for sale, and I am interested, if I can figure out how to get parts for it. I'm hoping to find out what the basic equivalent for it was in North America, so I will have a machine to use for ordering parts at the dealer.

Thanks
Brian