Amazon.com: Graphics Card GPU Support Bracket - Universal Adjustable Height Video Card Anti Sag Brace Holder with Magnets and Non-Slip Rubber, Computer Vertical GPU Mount Supports 4.72 inches Height (Matte Black) :
Mnpctech Stage 2 Vertical Video Card GPU Mounting Bracket
PCIE Vertical Upright GPU Mount Kit Universal Bracket 7 PCI Slots VGA Support Holder ATX PC Case w PCI-E 5.0 4.0 3.0 Riser Cable - AliExpress
Armature - Vertical GPU Mount – Yuel Beast Designs
Vertical or Horizontal GPU Mounting – What's the Difference? | AORUS