Spare part for Ikea Lersta lamp

The piece that joins the lower and upper tube of the Ikea Lersta lamp. For the case that this thing got lost when moving.

Note, however, that the part is definitely not strong enough in plastic alone, so it needs a 6 mm bolt through it for reinforcement. There is not really enough room for the nut, so the nut needs to be rounded (in a lathe if you have one) to fit.