Sorry I read too fast... I understood CRMD_ORDERADM_H and I explained another thing...so forget about it, but the link Is still valid 
If AET enhance the same customer includes which where used by EEW and this customer includes are placed in a screen BADI you can use this fields in GUI, doesn't make sense as everybody saids GUI is not supported anymore but technically is possible,which actually was the topic of your question.
Cheers!
Luis.