I have one of those security doors that everyone has these days (instead of a screen door) in front of my regular front door. The problem is that these retaining clips that hold the two glass pieces in place on the security door, always seem to break off all the time and generally just loosen up. I believe it is from the southern exposure and all the heat/cold just causes these plastic clips to break over time. I used to have a bucket full of these clips and can't seem to find them at my local ace hardware store. Does anyone know where I can purchase these retaining clips (if that's what they're even called!).