Alternatively, you could buy several items as shown below from UK sources, take them apart and reconfigure to your liking. In my experience, all of these parts are screwed together, thus they can be redesigned by mixing up the various parts from different sources.
You might already have a small round base, but you need to add weight or width to the small round base if you attach an arm with three segments.
Also, if a base has a felt bottom, just rip it off to find the screw that attaches the arm.
Just look closely at what is offered to understand how parts from the various items can be interchanged.