Hi Suga:
Like Sabitha mentioned, you will get pressure cookers at Indian stores. Also, you get them in local stores like Tesco and Argos. You may or may not get Indian brands. However, a friend of mine bought at a local store (cannot remember if it was Tower or Tefal brand) and she was quite happy with it - she was doubly pleased since the cooker didn't whistle

and make a noise! Sorry, I cannot remember the price.
Hope this helps.
Sindhu