CSE-505-203B Case...
I used the Supermicro CSE-505-203B because it’s a clean 1U rackmount chassis and it puts the I/O in the front, which makes cabling to a patch panel and switch way less messy. It also comes with a 200W gold-rated PSU, but be aware it’s tight inside and cable routing isn’t great.
You'll be taken to Ebay to complete your purchase.