Quite difficult, but not impossible. There were a few Mustangs shipped to Sweden in 65 and 66, could have been 500 cars per year. My parents bought a new Honey Gold 1965 coupe early in 1966.
When it comes to parts, the biggest problem is the distance to the US. The shipping cost, customs and tax are heavy costs and nearly doubles the cost before it is in my garage. But we manage. And again thank you for the advice.