CAD models of the Robin and Woodpecker Heatspreader and Heatsink can be found on the following page:
http://www.3dcontentcentral.com/parts/supplier/Toradex.aspx
One can also download the CAD model of Robin Heatspreader here:
http://files.toradex.com/X86/Robin/Heatspreader/Robin_Z5xx_Heatspreader_V10_3D_Model.SLDPRT
The CAD model of Robin Heatsink can be downloaded here:
http://files.toradex.com/X86/Robin/Heatsink/Robin_Z5xx_Heatsink_V10_3D_Model.SLDPRT