I know someone who made a long spike for their Jiffy stand so they could play bari while standing up but with it attached to the base of the Jiffy stand (the upper flattened end of the spike slots into the aluminium block that's clamped around the bell). They used a piece of tubing from an old microphone stand but any steel tubing with 1/2" internal diameter should fit onto a Jiffy stand base.
But Jiffy stands are expensive so look for used ones on eBay as they crop up every now and then. I've had one fitted to my bari for years so I can play without using a sling if it's a seated gig or in pit bands where it's great for doubling, but it is a fairly chunky piece of metal that is clamped onto the bell (which some people find ugly) with the lowest ring clamped on or above the joint ring above the C# tonehole.
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