Used to work for a company that had a customer in the US and always took a care package of Swiss and Cadbury chocolate from the duty free shop for their head office staff. One guy gave me a bar of their version of a Kit Kat. It was gopping.
Also took cans of Boddingtons for the head of their IT department who was ex USAF and picked up the taste for it when he was based in the UK.
I did the reverse import once.
I went to Mars HQ (the chocolate people not the planet) in Washington once. They give guests a really nice white box with a shitload of choccy bars in it. The two American colleagues I went with gave me their boxes as they didn't have any kids.
My kids thought they were shite.
They still ate them though.