Old is relative, I'm still making these, here's three finished in April- early May: a nicely figured Koa, Cherry and another Pacific Madrone.
The Cherry and the Wenge with brass dust finish are a bit longer so there is room for 2 18350's and a PTR8100 which I have been exclusively vaping for the last while, real nice vape and longer battery life than a boosted 18650.
The brass tube insert is K&S Engineering 5/8" OD tube, very easy to get at Ace for example. They also make a telescoping size just below this 19/32" that I use for the power module tube, that has a 15.1mm OD. The metric part is the 15mm plexiglass and aluminum tube for the atty, which would be hard to get in the states. You could substitute for that 15.1mm size if you can find it. Omnimodels on ebay is a good source for brass and alu tubing, but I don't see they have alu in that size. If you get real close with everything else, I'm coming to the states in under a month and could bring you a foot or so of each.