Is it possible to buy a large (7ft) Christmas tree in a pot?

[virgiltracey]

Or is that just too big for a potted tree? I've been googling for ages and can't find any over about 5ft.

I haven't been able to find any so I think perhaps they don't exist. We need trees to go along our boundary (currently just a rubbish wire fence) and so I was trying to kill two birds with one stone and feel good about myself at the same time! Oh well