Unfortunately, as others have mentioned, there is no simple way in which to achieve this, which is what you are looking for. The only correct way to do so would be to manually replace them by editing and uploading them to the attachment system.
As opentype pointed out there, the only proper way for these to be part of the suite is an attachment, so doing it this way would be the correct way. While you could potentially employ a 3rd party to change the locations in the database, you are simply kicking the issue down the road to come up again at a later date