I sell 3000+ branded items and have trawled through suggested databases and called a few manufacturers to try and obtain these codes.
Most of them just do not appear to exist. Yet i am faced with a cut off date if i do not sort it!
I sell central heating items such as boilers and radiators and the brands have been around for decades yet they cannot help.
You are advised to go thru the thread linked-to below very thoroughly.
Hope the above will help a bit.