Not really that expensive, given the benefits. Right. But this wouldn't be too difficult to make either. Or have made in one of the small metal fabrication shops that probably exist in your area. And you could modify the design to your liking. Probably at just about the same cost, though your own time I'm not figuring into the equation and it might be considerable. Still, it beats slouching around at night, watching the electronic "Irishman," wot?
One reason America today is in such a sad state is that there are few real Americans dwelling here. I'm sure the old-timers would agree. I'm all for division of labor, but when everything still costs you way more anyhow, where's the benefit?
Think of those old farmers who would design and fabricate just about everything come hell or high water. That's the ticket!