3D Data (simplified) for DFR Products available?

Hi all
I have a question, concerning 3D Data of DFRobot products:

 

For visualization and installation space investigations for an electronic assembly project at my company, i am currently searching simplified 3D (STEP- Format) data for the following products:
 

- DFR0831 DC-DC Buck Converter 7-24V to 5V 4A- DFR0601 Dual-Channel DC Motor Driver-12A - DFR0626 MCP23017 I2C 16 Digital IO Expansion Module

 

Are there such files or links available here? At the GrabCAD site, some models are available, but unfortunately not the mentioned.

 

Thank you all in advance for help and useful tips!

 

Thomas