I'm not sure if it can be done or not but how about a metal, wood or plastic frame for the front. Use 1" or 1/2" hardware cloth for the insert so it doesn't cause any temp change within the rack. Either use a hinge & hasp set up so it swings open like a door or put a couple of screw eyes in the bottpm of the rack frame, align two rods to fit into them that are attached to the bottom of the door. Drop the rod's in and then attach a couple of hasps over the top frame and rack and padlock them. Then when you need to get into the rack you can just remove the "door". Just an idea.
Bruce Delles c/o Twin Cities Reptiles
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