Thanks for your help, Explains why no IAW number on parts, thanks again

Hi. I need a new ec unit for my punto 1.2 16v,2003 plate but reg early jan 2004, I have the Bosch part number 0261 208 029 but being asked by various companies for an IAW number, I have taken the ec unit of the car and I have all sorts of numbers but not what they are asking for, can anybody help pl...