This is a Raspberry Pi 4 created from the official Raspberry Pi 4 DXF file found at the following link: https://www.raspberrypi.org/documentation/hardware/raspberrypi/mechanical/README.md
I created it as a mock up for some projects I am working on as handy to have a working model for assemblies. The STL and STEP file are uploaded here.
I basically extruded the ICs and few of the larger components, then added and placed best fit 3.5mm jack, USB-C, Micro HDMI, USB 3 and Ethernet connectors.
Should prove useful for anyone making a project with a Raspberry Pi 4 so they can prototype the assembly before actually printing.