can you buy this piece..

Got wondering so checked some of the junkers laying around the place, the Omni had a airplane shaped "T", then checked the 78 Dodge motorhome, and it had one like in the picture, got if off, and it still seems to be in good shape, I assume vans would have the same. it is mounted under the drivers side cowl above the battery(right above the ignition box).
Now 2 questions: 1. Where does it go on the Dart(pics please) Don't remember which direction it mounted. 2. where can I put it so I will remember where it is when I need it?

Aaron