Wondering if anyone know where to find these little plastic inserts for the HVAC Vents? I have searched this forum, the net, and have only been able to find the complete vent assemblies?
If I cannot find the inserts, my only thoughts are to either attempt fabrication of an insert or use a black caulking.
If I cannot find the inserts, my only thoughts are to either attempt fabrication of an insert or use a black caulking.

