Glenn Ashmore writes:

That is a good price of the rod but Enco doesn't sell acme wing nuts.
You would have to buy a regular acme hex nut and weld on some rod for
handles.

I assume that would be the approach, if you're welding the stands
themselves.

Are the Brownells wing nuts a cast item, or welded, or what? Is this
something they make themselves or have made or is a more widely used
component?