4090 Single or Dual slot PCIe brackets? Are they available anywhere?

Using the slot on ASUS' new RTX 4060 Ti graphics card with an adapter allows users to connect their GPUs to practically any PCIe device

NVIDIA GeForce RTX 4090 24GB GDDR6x Graphics Card - Blower Style - 2 Slot - DisplayPort, HDMI - 3 Year Warranty

20 golden coins slot slot, with a quad-slot cooling system and presumably still two fans Because of the design, display outputs for the card are located in a

2019 slot 2 dilr MSI GeForce RTX 4090 AERO 2SLOT 24G GDDR6X Turbo Graphics Card ; Quantity 7 sold 15 available ; Item Number 374741742791 ; Brand MSI ; Connectors DisplayPort,