At Aqualabs Technology in the US.
A quick Google search on "Health Stone Glass" should lead you straight there
Actually, 4 years ago, when I discovered DMT and the Nexus, I used a Health Stone Glass vape a lot for DMT.
I was even using it more than the GVG for pure spice, as it was very easy to load : just weigh your spice, put it on the stone, heat it from afar with the torch lighter, and slowly bring the flame closer once the DMT melted.
The nice thing is that I could pre-load the stone soon after a travel so whenever I felt the call, I would just grab the pipe and the lighter, and 15 seconds later I was gone... It's the best way I had found back then to bypass the preflight stress, it just doesn't leave any time for the mind to find reasons not to do it
I also did that with the GVG, BTW, it was much more practical than building copper pads myself : just melt it on top of the stone instead of below on a pad.
Back on topic, I'm investigating the e-vape route on the steps of ducdevil for the moment. I got all the gear (75W box mod and sub-ohm clearo, 30/70 juice, FB DMT & Harmalas), just need to find my DMT balls back in order to experiment