How can I find paint with a specific RAL code?

[Mumblechum1]

I'm having 7 of the 8 front windows replaced and have chosen the window company's grey which is described as RAL 7004.

I'm going to paint the 8th window myself to match but haven't a clue how to find the correct paint.

Any clues anyone please?

TIA

Hi
Think this might be it
http://www.duluxtradepaintexpert.co.uk/colour/ral-7004

Perfect, thanks!