Strong Gooseneck Tubing/Pipe

I don't know the proper name for it.

Project time again.  Mr K (who is a very highly skilled toolmaker) just shook his head and sighed again so I'm doing the design and research before presenting him with it.  I'm doing the hard bit, he only has to make it or find someone who can.

I have a couple of gooseneck stands for tablets, and I want my monitor to be more flexible.  The ones I have are perfect but can't be adapted because they wouldn't take the weight (maybe 5kg for the monitor and VESA fitting).  It doesn't need to be overly flexible and bendy, just a bit more flexible than straight pipe would be.  I want to have it (somehow) attached to a small post or pole and permanently fixed to the sofa frame which will support the weight with nothing sticking out for me to trip over, which is the current situation with a custom-made stand we have; we've just moved to a new house and the legs of the stand have proved excellent toe-stubberers because they're not tucked away in an inaccessible place.

Also, on a somewhat related subject, does anyone know where/if we can get good quality aluminium welding done locally?  Things were so much easier back home when he had his own TIG/MIG thing with an endless supply of free stainless and could make everything himself (even when he said there was no way my designs and ideas would work).