Ikea Kvarnobank looking for a cylindrical counterpart with 2 holes

Must? Then Frau can keep looking, because maybe someone once bought such a bench and kept the connecting parts or. In any case, Frau does not give up so easily. Thank you.

Ask a metal workshop if they could give that to an apprentice as a practice assignment. He will probably still have to do more, but not 500 or 100 right away. Maybe only 10.

If the bench is generally made of wood, I would simply redo the joint with wood screws. You might see them then - so what.

Measure sizes, buy a suitable metal rod at the hardware store (or have one lying in the basement), drill holes, cut threads, saw to length, deburr. That's how I would do it. Maybe also mark it (digitally) and have it CNC milled or manufactured by an online fabricator. I would be interested to know exactly how this part is installed. Unfortunately, I couldn't find an assembly manual (anymore) online. Regards

But you do need quite a lot of tools for that, which the average person doesn't usually have on hand. Your second tip is more realistic. In my opinion, a pragmatic approach would still be to simply make the connection with wood screws and [gfs] brackets. In this respect, pictures would actually be interesting, showing which parts need to be connected at all...

Just saw now that this bench has a frame made of metal. So my suggestion with the wood screw is obviously out. It's probably about screwing a side panel with a leg to the crossbar. An angle bracket could still be the solution, but you would probably need metal drill bits, threaded screws, and nuts for this...