Sure, here it is without the helmet:
View attachment 814037
The dome and face part on mine looks odd because my initial estimates were slightly off. Had to add height for the dome (why it's thick) and extend the plate for the face (why the back end is barely catching on the PVC cap. I adjusted these for the templates.
Also, forgot to mention, painted the hardboard black after cutting, and then used adhesive backed felt for the parts to sit on. Not really to protect the helmet, but to keep the paint from lifting when removing the helmet off.
I cut the pieces with a laser, but hardboard can be scored and snapped. You can slightly adjust the shapes (straight edges where rounded). It needs to be scored more and doesn't give a clean edge like say acrylic, but the rough edges can be sanded. The PVC can be cut with almost any type saw (since the ends go into caps, they don't have to be perfect). The only other thing needed is a drill and something to cut the MDF (if that's what you wanted to use for the base, but could use several different materials).