I was looking through the Avialogs parts list last evening for the C47 and it was using 211 part numbers ( amongst others).  If you want to do some sleuthing going through their lists of ETO Douglas aircraft parts list may give you some success. At the end of parts catalogues it sometimes has a numerical list of parts used y part number. I have found this useful in identifying parts but takes time. You can also download them as PDF’s ( if you are a subscriber) which are then searchable by part number using search box in top RHS.

I have identified B17, B24 parts in this way and now C47.

Otherwise as Elliot says post on WIX.