3d model for 6240B heatsink

Hello everyone,
Is there a place where I can find the 3D model of 6240B heatsink for Rock 5B or at least the mechanical drawing/dimensions so I can make a 3D model ?
Also There is a plan on make similar heatsink for Rock 5B+ as this heatsink will not fit due to “Disable SPI” pin header ?
Best Regards

https://dl.radxa.com/accessories/heatsink-6240b/radxa_heatsink_6240b_v2.0_3d_stp.zip