I never looked to see what he charges but they look super easy to make. I'm not sure if the tubing is wood or not, but I hope so. The nice baseboard finish would be ruined by sticking PVC or similar tubing.

Could be done entirely as a nostalgic, hand tool project except I think I would really want to use a drill press with some clamping to drill out the oversize holes in the dowels.

With great power comes Awesome irresponsibility.