Classico Storage Case ATX Computer Case Mid Tower with 3x140mm &1x 120mm Fans, 4 Detachable Hard Drive Cages Support 10x 3.5" & 3 x 2.5", GPU Vertically Mounting, 360mm Radiator Ready on
3.5" Vertical HDD Mount - Fan-Mounted (2x-6x, 120mm/140mm) by AlephBaker | Download free STL model | Printables.com
Hard Drive Cage Kit - Type B — Fractal Design
Amazon.com: Hard Drive Cage,Galvanized Steel Plate + ABS Plastic Cage Hard Drive Tray Rack with Fan Space,Adapter Rack Bracket for Computer SATA 5.25in to 5X 3.5 : Electronics
I couldn't find a nice thin 120mm to 3.5” HDD mount. Turns out an OEM fan grill works really well. : r/sffpc
Lian Li EX-33N HDD Mount Kit with 120mm Fan – Coolerguys
Stackable HDD Rack W/fan Mount digital STL File - Etsy
Lian Li HDD Internal Rack Mount Kit Model EX-33X1 (All Black) – Coolerguys
CH-LAEXH35 internal aluminum hdd cage with 120mm fan
UK Only) Selling Stackable 4 Bay 3.5” Hard Drive Racks - includes fixing points for 120mm fan (PETG or PLA) - Buy/Sell/Trade - Chia Forum
Lian Li (EX-33X2) 3 x 3.5" HDD Extension Cage w/ 120mm Ball Bearing Fan - All Black EX-33X2-D
140mm Hard drive rack (Mirror Black), Mountain Mods
120mm Hard drive rack (Brushed ALU), Mountain Mods
5.25" to 3.5" 2.5" SSD Hard Drive Bay Tray Cooling Fan Mounting Bracket w/Screws : Electronics - Amazon.com