The parts book shows only one part number for this non latching version, so it's possible that they were either supplied by different vendors, or there may have been a running change in this particular part.
The glove box door was only serviced as an assembly, the front cover was not available separately so there is no info on this part in my book.
Ever thought about updating to the latching version? After all, you don't want the door to pop open under extreme acceleration & have your gloves fall on the floor. [well it is a 'glove' box isn't it?]