You can buy them in the UK, although they're both expensive and incredibly hard to find. So this used version of the iconic Joe Colombo Elda armchair could be worth considering, if you want one in your home.
Amazingly, it sates back to 1963, although it's generally considering a seat of the 70s – perhaps because of its widespread use in sci-fi movies and TV shows of that era.
For your money you get a reinforced ABS plastic swivel seat, with a plush interior of contrasting leather, in this case brown. The current owner has had it for a few years, but describes it as being in 'good condition' with 'a few marks' from age on the shell and obviously, some wear on the leather. £2,300 is the price.