Does anyone know what it might cost and how much work it’d take to import and update a Daihatsu Copen to be legal in the US?

I know it’s small and cute and low on power (86hp with the EU-spec 1.3L). But it looks and - as I understand - drives like the funnest of fun cars. I don’t have room/funds at the moment, but I want to know what would need to be modified, what I could expect to pay, and how much it would cost to import an EU-market Copen in excellent shape.