Front Grill Repair

I'm back for some more info. I'm about to clean-up my front plastic grill on my 1970 Dart Swinger when I noticed a couple of tabs busted off the back of the unit. Happened during storage and got pushed around a bit by the kids I guess. No-one seems to know how it happened. (How I would have guessed that.) Well, I have the tabs. The unit was bought years ago and doesn't need repainting as it looks new, just the tab repairs. I remember somwhere in the web site threads that you can repair these. Can't find it when you need it.......Does anyone know if you have to send away to get this repaired, or is there some type of good adhesive or something to use to repair them. Need some good advice.