My surround system uses stands that I bought from richer sounds, in pairs.
They don't sell them anymore - I looked!
It's basically a piece of black tempered glass with a hole bored in it.
The rod is telescopic and you can feed the wires into the pole top so they come out the bottom.
The rod has an external thread and a nut on either side of the glass base.. 4 rubber feet.
I do a bit of weird bodges at work and Amazon /ebay do stuff like these
https://www.ebay.co.uk/itm/174778620739?hash=item28b19e1b43:g:WjUAAOSwyFVgqken
Or buy something like this
https://www.amazon.co.uk/sourcing-m...6701&keywords=m5+studs&qid=1630268405&sr=8-12
And find a close enough tube to allow you to glue /lock it into the tube, having first run a bolt through the end to give you a stud on a cylinder.
Possibly harder with stainless but possible to stick it in a drill and sand or grind it down slightly if you cant't find someone with a machine shop.
Even epoxy putty may work?