Freestanding VESA stands aren't very popular. Most people want the desk clamp. There's also bolt through.
I think ATDEC has some nice stands which would be at home with the Studio Display. Here is a bolt through model.
Here's another real nice one with cable management. They offer a variety of mount options.
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www.atdec.com
Here's a freestanding single monitor steel (silver) stand.
Single Monitor Stand - For up to 34' (30.9lb/14kg) VESA Mount Monitors - Works with iMac, Apple Cinema, Thunderbolt Displays - Silver - Adjustable
www.startech.com
Here's another. If you can actually find it.
Eastern Global is Taiwan high quality Single Monitor Arm - Free Standing Type manufacturer and Single Monitor Arm - Free Standing Type supplier Eastern Global has three decades of experience in development, and manufacturing, the main products for Screen Holder, Ergonomic Workspace Tool, Monitor...
www.easternglobal.com.tw