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The colorful PVC is from www.formufit.com. Sort of silly, but fun. The plastic tubes are these: https://www.amazon.com/Ware-Manufacturing-Tunnels-Small-Inches/dp/B001LUMU9M/
The top platform has a removable tray that I built out of smaller-thickness PVC to fit the space, which is determined by the size of the RHP. There's some insulation and an air gap so the surface of the top platform doesn't get any hotter than a hot spot should, even at times when the panel is running at higher power. The lower platform is just a shallow plastic bin. Both can hold substrate and hides and are removable. The snake definitely makes full use of everything in there.
The bioactive substrate is new; the rest of it has been up and running like this for a couple of years and works pretty well.