I can find Calsberg at my large mega-mart grocery stores. No Tuborg though.
Tuborg Classic has to be one of my favorite beers. Impossible to find in the US.
On a side note, if you ever get the chance to take the Carlsberg brewery tour in Copenhagen, do it. I had a blast and got piss drunk. It was a lot of fun. I had every intention of brining back a case of Tuborg Classic on the train with me when I went back to school. Or course I ended up drinking it the day I was to leave and made it back with 2 beers.