Anybody know where I can find these parts?

I am interested in making a glass terrarium similar to the one pictured, but I cannot for the life of me find the two parts outlined in red. The strip of perforated metal for ventilation and the (plastic?) black channel/track for the glass "door" to slide into. Anyone know where I could find these parts for sale somewhere, or maybe ideas for something that I could work with and end up with the same result?



Or maybe even better... anybody know where I could buy a terrarium like the one pictured? It seems they can be found in abundance in online shops that are based in Europe, but no luck with a source in the US so far.

Just the obvious. The more exotic metal supply companies for perf metals and make your own channel with acrylic if you have the tools and expertise.