I modelled 2020 V Slot in Autodesk Fusion 360 (Free for makers). Posting here, incase sketchup isn't your cup of tea. Multiple industry standard formats downloadable from the link (OBJ, DWG, STEP, Etc). Hopefully it saves you a few minutes recreating the extrusion from the mechanical drawing.
I guestimated at the fillet of the corners - I guessed 1mm, but I can fix that if someone alerts me to the correct measurement.