Of course the Manufacturer knows what IR codes each set uses, however when YOU contact the Manufacturer do you really think you are speaking to the R&D Dept responsible?
And then You want to go a level deeper and ask for Discrete IR codes, these may not even be implemented on your device.
If you were able to speak to the correct Dept then maybe you would get what you are looking for, but speaking to someone on the 'helpdesk' is probably not going to result in much.
What TV do you have?
What Remote do you have?