The addition of a small amount of Pataks "Mild Curry Paste" to a particular base gravy recipe was one of the first things I investigated here, after I'd read about it over on a RCR. The promised recipe set to go with the sauce never eventuated. I had never seen the stuff, however I did manage to find a large catering sized jar of the pasts at a hospitality / restaurant supplies market and I really like it. It definitely reproduces the T/A / restaurant aroma and taste in any dish and a little goes a long way. I don't use it all the time as I don't want all my curries to taste the same.
Most of the Pataks pastes mentioned on here are not readily available over here. I can get Tandoori but not Balti, Kashmiri or Tikka, or at least not in standard home use jars anyway. There is a Tikka and a Balti pre-made sauce in a can but they are a different thing to a paste. Meat, heat and eat.