Railing fittings for spiral staircase

[Mortsken]

I have a Fontanot Zen space-saving staircase to the attic. We've had it for quite a while, but haven't really gotten around to finishing the railing. Unfortunately, it's really wobbly. The staircase looks like this:

Up until now, it hasn't been attached to the wall at all. This is what was included. I don't understand how it's supposed to be sturdy with just one bracket for the whole staircase.

I would need more of these, and I also need longer ones that can be angled. Does anyone know where to get such brackets? The staircase has been discontinued, so I can't get anything from there.

The best I've found are these: https://nautec.paperturn-view.com/nautec-produktkatalog-2025?pid=MTQ145852&p=687&v=16.3 But they are for 22 or 25 mm pipes. This pipe is 27mm. Possibly, I'll try with the 25 and see if it fits well enough.

Bonus would be to replace this bracket with something made of metal if anyone knows a suitable one. It's a joke that you can sell this in plastic considering how it bends.