Been working on this one for a while: case for an Intel NUC and a full sized hard drive with custom PCB for power : r/intelnuc
Intel Next Unit of Computing Kit 11 Pro Kit - NUC11TNHi50L - mini PC - Core i5 1135G7 2.4 GHz - 0 GB - no HDD - BNUC11TNHI50L00 - Mini PCs - CDW.com
Intel NUC NUC5I3RYHS Home and Business Desktop White (Intel i3-5005U 2-Core, 4GB RAM, 500GB HDD (2.5), Intel HD 5500, Wifi, Bluetooth, 4xUSB 3.0, 1x Mini HDMIxHDMI, 1 mini Display Port, Win 10 Pro) - Newegg.com
Amazon.com: Intel NUC 7 Mainstream Mini PC (NUC7i7BNHXG) - Core i7, 8GB RAM, 32GB Optane Memory, 2TB HDD : Electronics