Checked Google images, using a few key words!! 😉
Came accross a canadian company called REFF. Founded in the sixties and taken over by Knoll at a later date.
( I noticed you are based in Canada)
Have uploaded a few images of units very similar to yours.
Could be a starting point for your search.Good luck.
lexi.
ps. the poles were available either in metal or a wood finish.
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