TOPIC: Regenerate a Barcode for missing registrants

So, on occasion, it seems that someone may pay for a group of registrants, but the last person will be either completely missing from the database, OR they will have an entry that shows, but it will be blank. Often when this occurs, there is no barcode associated with the blank or missing entry. If I fill in the blank, the code won't generate. Is there a way to regen missing codes?

DT 2.8.2a (afraid to upgrade in middle of registrations)

So.. the best solution so far has been to go to a barcode generation side... generate your code type, then download it and place it in the dtregister images directory where the other images are stored, then reissue the thanks email. I went her http://www.racoindustries.com/barcodegenerator/1d/code-128.aspx to do this