Needed a few things so I created them in cad.
I got a bit carried away and made stuff I don't need but others might have a use for.

EDIT: Fixed a issue with the stand swivel parts. The top alignment disc was not touching the surface of the main body. Not sure how I missed this modeling error before.

If you have a old floor lamp with 9/16th OD tubing with 1/2-20 ID thread couplings, then the treaded caps will work with it. 1/2-20 threads are very common in lamp fixtures. If its loose, warp some tape around the thread of the top part.

The rotating mount has over 90% of rotation when mounted to one of the bases.

There is a square swivel mount for 4040 frame tubing and also round, screw on for table top mount. You can also mount this on the 4040 frame.

You will need a couple of 4mm cap screws and nuts for the swivel base.

I did not include any of the parts from the original. You will need to print what you need and also any other things. You for sure will need the double ended section some one else created a remix of.

I included 2 bases, one with loop holes to lacing .08 dia nylon cord to add support if you want to add a lot of extensions and are worried it will wobble. It most likely will if it's over 12 inches tall.
Each extension is 50mm long (about 2 inches).

I highly recommend doing a test print by sinking the parts in the bed in CURA and only printing the male and female threads to check if they will screw together.
If they do not, you machine needs calibration. Usually, just turning the flow down to 90-93 percent works for me on my Ender 3 Pro. Of course, if you are not using these parts, there is no need to test print.

Creality

Ender 3 Pro

No

Yes

200

20 minimum