So something free-standing? How about something like this? Probably easier to buy it instead of DIY.
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Am I not understanding the question? Or you just want to make some yourself?
So you know what I was thinking... trailer handle
https://www.amazon.com/World-American-WA14-5012-Vertical-Handle/dp/B00IVQO3R6/
You just need to find a coupler and a rotating handle that works. With the price of pipe, 23 bucks per handle can't be too far off.